The method for reservoir protection mining

 

(57) Abstract:

The invention relates to mining and can be used for the protection of formation of the mine workings, which are exposed to wastewater treatment works. For this purpose the length of the working part of the layer is equal to a multiple of the total distance between the main natural cracks of the main roof in the direction of the development layer. Longwall working face of the reservoir to move the whole line to develop, secure the whole of the coal from the influence of the treatment works are working out of the reservoir. Plast work in the direction of falling of the basic natural cracks of the main roof from the line stope in a goaf. As a result of use of the invention reduces the cost of securing and maintaining roadways and increases their stability. 2 Il.

The invention relates to the mining industry and can be used to protect the reservoir excavations in the zone of influence of the treatment works from the reference pressure, which occurs when the seam with a complete collapse of the roof rocks in the developed space. The method is intended for protection of brumbelow, slope, slopes, drifts, and other workings, rspt pillar of coal.

With the approach of the stope to the development on the pillar of coal left behind her for protection from the harmful effects of the treatment works, hanging rock, the main roof of the reservoir, underworked treatment formulation, the result is a great reference pressure to the rear and secure production. The reference pressure caused by the hanging of the main roof of the reservoir, often leads to the separation of pillar coal, damage the lining of the secure generation and the loss of its stability. Hanging rock main roof of the reservoir on the border of the goaf transfer your weight and have an adverse impact on the protected production in almost the entire period of its service. These rocks form a fixed reference pressure in the marginal parts of the layers bordering the goaf, and placed them in preparatory development. Especially great is the reference pressure from the overhanging rocks of the main roof to the rear of the coal and the cost of mounting and maintaining roadways during the deposition of the top layer of strong and very strong breeds increased power. These rocks, not bruchas, hang on pillar coal (mineral) and other protection measures workings of the console and create a large load (prigruzki)th reference pressure, resulting from the action of the weight hanging on them of the roof rocks, it doesn't influence the reference pressure from conducting cleanup activities associated with very large losses of coal (other minerals) in the subsoil. In particular, reached the depths of the development of coal seams in the Kemerovo region (400-700 m) for protection under normal operating conditions of brumbelow, slope, and other workings from the harmful effects of the reference pressure cleaning work required by them to leave on each side pillars with a width of 60-80 m Leaving pillars of such size leads to losses of up to 30-40% of the coal in the bowels. Therefore, in practice, generate guarding the pillars of coal are much smaller. However, this leads to the spread of dangerous bearing pressure on protected rock deformation and breakage of the support, to a large repair works.

Known methods of protection of openings from the reference pressure hanging rocks on the pillar of coal (fossil fuels), is left near them on the border with developed a treatment space (and.with. N 1239348, E 21 D 11/00; and.with. N 817253, E 21 C 37/00; E 21 D 9/00; and.with. N 1046523, E 21 D 11/00; and.with. N 875075, E 21 D 13/02; and.with. N 947425, E 21 C 41/04; and.with. N 983273, E 21 C 41/04; and. C. N 1165786, E 21 C 41/04; and.with. N 1254165, E 21 D 11/14; and.with. N 14239348 is that zone of inelastic deformations create through split furnace between the secure generation and clearing face and repayment split furnace outside of the zone of support pressure. Split oven held at a distance equal to the sum of the magnitude of the inelastic deformation zones develop and split furnace. The disadvantage of this method is the need for a split furnace, maintenance and repayment of her, which is associated with significant additional costs and resources for this work. In addition, this method is not based on the choice of the length of the working part of the reservoir, from the basic natural fracturing of rocks of the main roof of the reservoir and the direction of extraction of the mineral to be mined part of the layer from the drop of the major natural cracks relative to the line stope.

The disadvantages of the methods of protection of openings along.with. 875075 and N 947425 is that they do not provide prevent the freezing of rocks of the main roof of the reservoir, i.e. the reason for the formation and operation of the reference pressure in the zone of influence of the treatment works. Physical entity they do not correspond to the nature of the manifestations of rock pressure during collapse of the main roof of the developed layers.

Method of unloading mining voltage.with. N 1046523 designed for unloading openings at the ore bodies, ore deposits with nervecentre stress fields by drilling in the vicinity of their fan-shaped wells and blasting charges by drilling blasting chambers. The method requires a large amount of blasting that is associated with more harmful dynamic effects on production, so it is not suitable for the protection and unloading workings in coal seams.

The main disadvantage of the protection of reservoir openings along.with. 1195008 is that it does not collapse rocks of the main roof of the reservoir at the time of the failover section of the reservoir and approach stope to the border of the protective pillar of coal in protected production (kind of Bremberg, slope, slope, and others, located parallel to the stope), as the length of the working part of the layer are not interconnected with the ratio of the distance between the main natural cracks of the main roof of the reservoir. So when a failover section of the reservoir is not usually the collapse of rocks of the main roof of the reservoir, the latter hanging on the pillar of coal wie throughout the lifetime of the generation.

According to the method A. with. N 983273 unloading produce from the reference pressure of the overhanging rocks of the main roof at the edge portion of the coal massif and its protection is achieved by forcing the collapse of their drilling and blasting method. The method includes the construction of niches in the sides of the protected work out its entire length, the drilling of the niches on the entire capacity of the main roof of the reservoir, i.e., hanging rocks and forming dangerous the reference pressure, and drilling carried out in a fan in a vertical plane located along the axis of generation and at a distance from the excavation contour equal to half its width. This method is very time consuming, requires a large amount of NIS and blasting. Furthermore, the method results in uneven collapse of the overhanging rocks, to dynamic shock from the explosion of the charges.

Similar significant disadvantages of the method along.with. 983273 has a way of protection of openings along.with. 1165786. It is intended and applicable for excavations, supported behind the treatment of mine workings on the border with mined-out space for reuse. The method is very time-consuming, as it requires a great deal of Pasechnik and blasting.

By and.with. 1254165 SIP lining and reducing the complexity of its installation and dismantling. This method does not provide prevent the freezing of rocks of the main roof of the reservoir to the rear of the coal in the protected output.

Known methods of protection reservoir workings from the reference pressure in the zone of influence of the treatment works the closest to the present invention is a method according to and.with. 1467183, E 21 C 41/04.

The essence of this method lies in the fact that unloading protected output from the reference pressure is achieved by the fact that the relief well production conducted in a protective pillar of coal, additionally carry out the slit in the roof of the layer normal to the unconformity at the height of ensuring the collapse of the cantilever hanging rocks on the pillar of coal and full poducavanje underworked overlying formations and a slit in the soil layer along the normal to it at a depth that prevents the distribution of bearing pressure through the soil layer on the protective pillar of coal.

The formation of handling the production and handling of gaps to complete the approximation of the sewage treatment works discharge generation and cracks on the length of the plot worked for a time for which a treatment works will move to the discharge development and slots by an amount equal to the length distribution of the reference pressure is ug handling the production and handling of cracks after them.

The main disadvantage of this method is that to prevent the freezing of rocks of the main roof and the formation of dangerous bearing pressure on the safety pillar of coal and guarded development, to which the entire length of the moving longwall face, should be handling the production in the outer part of the rear sight and out of the discharge gap in the roof and the ground layer normal to the unconformity of the rocks.

These time consuming, as require the discharge openings and cracks. Especially labor-intensive unloading device of the cracks in the roof and the ground layer.

A big disadvantage of this method is that the length of the working part of the reservoir clearing face and the location of the discharge elaborate on the border pillar coal and developed treatment space take without regard to natural fracturing of the main roof of the reservoir and the orientation of the fall of the natural crack in the line (front) stope.

The aim of the invention is to reduce the cost of securing and maintaining roadways and increase their sustainability.

The objective is achieved by the fact that in the proposed method, including the abandonment of protective t is her line (front) parallel to the location of the secure generation, characterized in that the length of the working part of the reservoir clearing face is equal to a multiple of the total distance between the main natural cracks of the main roof in the direction of the testing of the reservoir, the reservoir work in the direction of falling of the basic natural cracks of the main roof from the line stope in a goaf.

The main natural cracks in the side of the rocks of the coal formations (sedimentary rocks), as is known from structural Geology are always at an angle close to direct, to the unconformity rocks, coal seams. Most clearly this structural feature of the rocks is expressed in the main roof of the coal seam.

The proposed method provides compared to the prototype unloading pillar coal and protected production without holding in the marginal parts of the pillar special handling workings and devices in their handling of the cracks in the roof and the ground layer, i.e. without performing a significant amount of time consuming and expensive work.

In the present method in comparison with the prototype, the unloading of the rear sight and protected them develop from the reference pressure overhanging rocks of the main roof is of stope (split furnace, mounting the camera mechanized complex) to its end position at the time of testing directly on the border with the entire coal in protected production is equal to a multiple of the total distance between the main natural cracks of the main roof and consequently spontaneous collapse of the last block of the main roof above the goaf to contact the main natural cracks along the entire length of the line stope directly on the border with safety entirely of coal.

Integrity the boundaries of the working parts of the reservoir and pillar coal has secured production of the conditions match it with the surface of the main natural cracks of the main roof of the reservoir provides a spontaneous collapse of the last block of the main roof in the mined-out space on the surface of the cracks without hang it on the pillar across the length of the stope and, thus eliminating the formation and effect of bearing pressure.

In addition, the development of the reservoir in the direction of falling of the basic natural cracks of the main roof from the line stope towards the goaf provides significant is how the center of gravity of rock blocks of the roof (roof sites between adjacent main natural cracks) is directed in the mined-out area for the bottom space.

Conducted by the applicant's analysis of the prior art, including searching by the patent and scientific and technical information sources, and identify sources that contain information about the equivalents of the claimed invention, has allowed to establish that the applicant had not found the source, which is characterized by signs, identical to all the essential features of the claimed invention. The definition from the list of identified unique prototype, as the most similar set of features analogues, has allowed to establish the essential towards perceived by the applicant to the technical result of the distinctive features in the proposed method, set forth in the claims.

Therefore, the claimed invention meets the condition of "novelty."

In Fig. 1 shows a plan diagram of the working parts of the reservoir with a length equal to a multiple of the total distance between the main natural cracks of the main roof of the reservoir, guarded entire generation of coal, to which all fronts simultaneously moving longwall face; Fig.2 - cross section a-a in Fig.1.

The method is as follows.

When performing geologorazvedochnoe the recess define and record basic natural cracks in the side of the rocks of the coal the distance between them, the direction and the angle of incidence of cracks. To simulate taking part 1 of the layer length LRefthat equals a multiple of the total distance between the main natural cracks of the main roof,

< / BR>
where

lB. 1-the distance between adjacent main natural cracks of the main roof of the reservoir, i.e. the width of the i-th block of the main roof, a limited major natural cracks, M.;

n is the number of blocks within the working part of the layer.

Before beginning cleaning work in the working out of the reservoir beyond conduct production 2 (Broberg, slope, or other), guarded from the goaf working out of the reservoir entirely of coal 3. Then spend the excavation drifts (ventilation and conveyor) 4,5 sewage generation 6 (lava, etc.).

When adopted by the length of the working part of the layer boundary pillar 3 and the boundary of the working part of the layer coincides with the surface of the main natural cracks of the last block 7 of the main roof of the reservoir. The direction of testing part 1 reservoir accept so that basic natural cracks 8 main roof stratum were tilted from the line of the Lasta (on modern technical and technological level of development of coal-bed methane) gently sloping and sloping depth of 1.5-2 km, the steep growth of 1.1-1.5 km.

The proposed method improves the reliability and efficiency of maintaining openings in the zone of influence of the treatment works, eliminates the formation of harmful effects of bearing pressure, increases stability, reduces the cost of mounting and protection of openings through better use of structural-textural elements and surfaces weakening of the rocks of the main roof of coal seams and features caving rock rocks the main roof depending on the angle of incidence of the main natural cracks of the roof relative to the reservoir, take the direction of excavation.

The method for reservoir protection of excavations, including the abandonment of the protective pillar of coal between waste treatment space and secure development, podvigina stope whole line parallel to the location of the secure generation, characterized in that the length of the working part of the reservoir clearing face is equal to a multiple of the total distance between the main natural cracks of the main krowki in the direction of the mining seam, and the seam work in the direction of falling of the basic natural cracks of the main krowki

 

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EFFECT: higher efficiency.

2 cl, 3 dwg

FIELD: mining industry.

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EFFECT: higher efficiency, effectiveness, broader functional capabilities.

8 cl, 5 dwg

FIELD: mining industry.

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EFFECT: higher precision, higher speed of operation.

2 cl, 3 dwg

FIELD: mining industry.

SUBSTANCE: method includes erection of rows of main platforms along bed length in staggered order with length equal or divisible by step value for support displacement, and placing filling material thereon. Along length of main platforms between ceiling and bed soil post support is mounted, upon which filling material is fed. After that between main platforms additional platforms are erected with wedge supporting, and main platforms are rotated counter-clockwise towards pneumatic support and it is displaced for one drive step. During that filling material, while lowering, unwedges wedge support between ceiling and bed soil and forms artificial supports. After that additional platforms are rotated counter-clockwise towards pneumatic support. After movement of cleaning face for two drive steps operations for constructing artificial supports are repeated. Distance between main platforms along bed fall line are selected from mathematical expression.

EFFECT: higher efficiency.

2 dwg

FIELD: mining industry.

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EFFECT: higher intensiveness, higher reliability.

3 dwg

FIELD: mining industry.

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EFFECT: higher intensiveness of operation.

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FIELD: mining industry.

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EFFECT: higher efficiency and higher safety.

3 cl, 2 dwg

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EFFECT: higher efficiency.

1 dwg

FIELD: mining industry.

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EFFECT: higher personnel safety, higher efficiency, lower costs.

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FIELD: mining industry.

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EFFECT: higher efficiency, higher personnel safety.

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