The method of dewatering of excavation fields

 

(57) Abstract:

Usage: the invention relates to mining and can be used in underground mining with sustainable irrigated rocks of the main roof with low filtration properties. The technical result is increased efficiency, faster drying and elimination or significant reduction of the risk of breakthrough of groundwater in the excavation. The essence of the invention: in the excavation field constructed from the surface of vodopadnyaya wells and conduct a preliminary drainage. Then pass the excavation and cut excavation posts at an angle to the longitudinal axes of which are cut drainage excavation post, one of his overcontouring excavations carried out along the projected slotted openings. Parallel to the contour formulation spend drainage production behind the value of the reference pressure from longwall mined drainage excavation post. Of drainage production in the drainage cavity Buryats itself well. Then presecco or leaving a pillar from the exhaust drainage excavation of the post, cut the split output. 2 C.p. f-crystals, 3 ill.

The invention against the m mineral deposits with sustainable irrigated rocks of the main roof with low filtration properties.

Known Kontorovich-ahead-of-way drainage excavation fields, including at the level of the split furnace or at some distance from it parallel to the roadway main directions of advanced drainage generation, followed by podvigina bottom for drainage Naugolnykh Sands Buryats inclined forward well at a distance equal to 25-50 m apart, set between knock-in filters.

Drainage excavation fields in a known manner in the context of sustainable water formations of the main roof with low filtration properties ineffective to start doing cleaning work. Really draining Naugolnykh Sands will improve conditions for the passage of the mine workings, but does not provide the main drainage of the roof, that will be an obstacle for the development of the mining of the pillar of lava, as sludge and the collapse of the main roof will lead to the formation of fractures and intensification of water loss of the overlying rocks, which will threaten the breakthroughs of water and sand in the excavation.

Closest to the proposed to the technical essence and the achieved result is a method of dewatering excavation fields, including the facility is the author of the mining of pillars of the first phase of testing, with the length of a lava smaller size of a full landing of the main roof, and the subsequent development stage, the development of the mining of pillars in two stages with the formation of the drainage cavity under steady flooded the roof rocks of the mining of pillars of the first stage, the construction itself of the wells from mining in the drainage cavity, removing water heads and refinement of the pillars of the subsequent stage [1]

One of the disadvantages of the known solutions is that most of the drained excavation pillar of the first phase of testing becomes once on its longitudinal axis formed drainage cavity and from the cavity removed the pressure of the water. The same disadvantage applies to the extraction columns of the second development stage, as drained are actually only rocks from the mining of pillars, while from the side of the pillar, or the boundaries of the extraction field, the drying is conducted only by drilling dewatering wells, which is insufficient in terms of sustainable water formations of the main roof with low filtration properties. Thus, the beginning of a longwall pillar of any stage is the most dangerous from the point of view of a breakthrough groundwater from the roof, which is confirmed by practically and treatment of the faces, the development of mining activities, leading to the loss of mining equipment and failure for a long time entire sections of a mine field.

The invention consists in that the angle between longitudinal axes cut excavation pillars subsequent stage cut drainage excavation post, one of overcontouring workings of which are performed along the slotted openings of the mining of pillars subsequent stage, parallel to the contour develop drainage, excavation and post spend drainage production, which cut behind the value of the reference pressure from longwall mined drainage excavation pillar, rising well into the drainage cavity Buryats from the drainage generation, presecco, or separation from the waste land drainage excavation of the post, cut split production of the mining of pillars subsequent stage.

In addition, drainage, excavation and post cut at right angles to the longitudinal axis of the mining of pillars subsequent stage.

In addition, split production of the mining of pillars subsequent stage is cut in the zone of established rock pressure collapsed rocks from podvigina lava drainage excavation post.

The technical result of the proposed solutions in comparison with the prototype is to increase efficiency and accelerate the dewatering excavation fields in the area of slotted openings extraction of pillars in terms enables you to eliminate, or significantly reduce the risk of breakthrough of groundwater in the excavation at the conclusion of the love of the mining of pillars drained the extraction field of the installation of the cameras.

In Fig. 1 shows a diagram of the drain extraction field in plan; Fig. 2 is a view along a-a in Fig. 1; Fig. 3 the development stages of the method.

In the drawings shown: excavation field 1, excavation of the main directions 2, excavation pillars subsequent development stage 3, 4, 5, 6, 7, excavation excavation 8, the boundaries of the extraction field 9, the drain extraction column 10, one of which contour openings 11 drainage excavation of pole, split output 12, and the other contour generation 13 drainage excavation of pole drain output 14, a zone of support pressure l, lava 15, vodopadnyaya well 16, the breed of the main roof 17, drainage cavity 18, which war against the borehole 19.

The method is as follows. In planned improvement taking field 1 build from the surface of vodopadnyaya wells with pumping means and produce a preliminary drainage excavation field by pumping groundwater to safe for mining excavation level. Then go mining major areas 2 and cut off the Itza 9 extraction field 1 or the boundaries of the mining panel, scheduled for completion at an angle to the longitudinal axis of the mining of pillars 3, 4, 5, 6, 7 cut drainage extraction column 10. If the configuration of the extraction field 1, the drain extraction column 10 is cut at a right angle to the longitudinal axis of the mining of pillars 3, 4, 5, 6, 7. The width of the drain extraction column 10 (the length of the lava) take the smaller size of the complete landing of the main roof from caving rocks. One of overcontouring openings 11 drainage excavation of pole 10 are performed along the projected slotted openings 12. Parallel to the contour generation 13 drainage excavation of pole 10 spend drainage production 14 which cut behind the value of the reference pressure l from lava 15 working drainage excavation of pole 10. Before you begin lava 15 drainage excavation post 10 along its

the longitudinal axis of the post, vodopadnyaya wells 16. When mining drainage, excavation and post 10 under sustainable irrigated rocks 17 main roof form a drainage cavity 18 and lead from her pumping water through vodopadnyaya wells 16. Due to the fact that the rocks of the main roof 17 have low filtration properties of the drainage generation 14 in drainage palasad roof in these conditions. After podvigina lava 15 drainage excavation of pole 10 presecco, or if you do not allow mining and geological conditions, leaving a pillar of minerals (not shown) of a width of 7-10 m are split production 12. In unstable conditions the immediate wall rock split formulation preferably take place in the zone of established rock pressure lava 15 drainage excavation of pole 10, which is for example for the conditions of Moscow coal 30-70 meters To the most favorable of a longwall pillars subsequent stages 3, 4, 5, 6, 7 preferably cut into various widths. For example, extraction columns 3, 5, 7 width smaller size of a full landing of the main roof, and extraction columns 4, 6 length for landing the main roof. Then after a failover drainage excavation of pole 10 and removing the pressure of water from its drainage strip 18, work extraction columns 3, 5, 7, over which in turn also create a drainage cavity, from which pump water through vodopadnyaya well. Then work out located between extraction columns 4 and 6.

1. The METHOD of DEWATERING of EXCAVATION FIELDS, including the construction with the surface of a dewatering with whom and testing with the length of a lava of magnitude less than the full landing of the main roof and the subsequent development stage, mining the mining of pillars in two stages with the formation of the drainage cavity under steady flooded the roof rocks of the mining of pillars of the first stage, the construction itself of the wells from mining in the drainage cavity, removing water heads, cutting split workings and development of the mining of pillars subsequent stage, wherein the angle between longitudinal axes cut excavation pillars subsequent stage cut drainage excavation post, one of overcontouring workings of which are performed along the slotted openings of the mining of pillars subsequent stage, parallel to the contour develop drainage, excavation and post spend drain output which cut behind the value of the reference pressure from longwall mined drainage excavation pillar, rising well into the drainage cavity Buryats from drain output, and split production of the mining of pillars subsequent stage cut presecco or leaving a pillar from the exhaust drainage excavation post.

2. The method according to p. 1, characterized in that the drain extraction column cut at a right angle to the longitudinal axis of the mining of pillars subsequent stage.

 

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