Method for controlling hard-destructible ceiling

FIELD: mining industry.

SUBSTANCE: method includes partial filling of extracted space of side and central mains by filling stripes from lava extracting shafts. At center of semi-lava on the side of massive, wherein next extractive column will be cut, filling shaft is additionally driven, wherefrom full filling of space between central fill stripe and fill stripe on the side of massive is performed. Preparation of next extraction column is performed under protection of erected fill stripes.

EFFECT: higher safety, higher efficiency.

1 dwg

The invention relates to the mining industry and can be used in the development of potash and coal seams with difficult-to-collapse roofs, particularly when selective extraction of minerals partially mined-out space rubble strips.

Known way to control difficult-to-collapse roof, consisting in partial mined-out space two lateral and Central rubble strips, and the Central quarry lane lay in separate sections parallel to the stope as podvigina lava. However, this method is not effective enough and does not provide sufficient security, as 95% of cases of dynamic collapse of the main roof is in polulate side of the array, which will be cut following extraction column [RF Patent №2177546 Ugilec, Ovekoveci and other “Way to manage difficult-to-collapse roof”. IPC 7 E 21 41/18, BI No. 36, 2001].

Closest to the present invention is a method of management of difficult-to-collapse roof partially mined-out space, consisting in the construction of rock rubble strips perpendicular Oistamo slaughter [of Normative and methodical documents for the conduct of mining operations on the Starobin potassium salt Deposit. Salihorsk, Minsk, 1995 - St is. 122-124]. For the protection of preparatory workings and ensure safe working practices between developed or prepared by the panels left pillar. When the depth of development N=500-800 m width of this pillar reaches h=25-40 m, and the extraction of minerals from the subsoil decreases by 10-15%, which is a significant drawback.

Partial tab at the implementation of this method is the Central and lateral stripes perpendicular to the line of the stope and is the backbone for blocks oroshaemykh species, thereby increasing their size and, consequently, the pressure on the posts of the stope. This significantly reduces the security of the work and creates an emergency situation in the lava.

The technical result is achieved that the way to control difficult-to-collapse roof, including partial mined-out space of the side and Central rubble strips of excavation drifts lava, according to the invention, the center of Pallavi side of the array, which will be prepared following the excavation of the post additionally goes backfill drift, which produces a full tab space between the Central rubble strip and rubble strip from the side of the array, while preparing the next post excavation carried out under the protection of the built Butova the bands.

The way to control difficult-to-collapse roof is illustrated by a drawing, which shows a view in plan on the extraction column.

The drawing shows:

1 - panel conveyor drift; 2 - disposable drift; 3 - conveyor drift lava; 4 - transport and drift lava; 5 - Central ventilation drift; 6 - filling the roadway; 7 - AFC; 8 - loader; 9 - thrower; 10 - rubble strips; 11 - the uncovered area of a mine field, which is prepared following extraction column; 12 - quarry-band exhaust post; L₁- the length of the first Pallavi; L₂- the length of the second Pallavi; L₁/3 - the width of the rubble strips.

The method is as follows:

For the preparation of the extraction column are the panel conveyor drift 1, disposable drift 2, conveyor drift lava 3, transport drift lava 4, Central ventilation passage 5. Additionally, the center Pallavi side of the array are filling the passage 6. Repulsed breed comes from the AFC 7 loader 8 and further to the thrower 9, by which it throw in stope width rubble strips L₁/3. The loader 8 and the thrower 9 installed under the support mate conveyor, ventilation and backfill drifts lava. Throwers are used settings, allowing vasodilative strip 10 such width, so that they overlap each other and between them there is no extra space.

Thus, the complete backing of a goaf first Pallavi, which is located on the side of the array. Preparatory development (panel conveyor drift) on the one hand limited by the array of minerals, and on the other hand - the rubble strip, the parameters of which, at this width, restore the properties of the array. Therefore, this formulation misses the waste space and are stored for later use when preparing a new post. The preparation of the next post excavation is under the protection of the built rubble strips without leaving Milovanova pillar, while the panel conveyor drift waste panel is used as - unloading passage of the new panel. Such training mine field allows a more complete extraction of minerals, increasing the recovery rate of 10-15%.

The way to control difficult-to-collapse roof, including partial mined-out space of the side and Central rubble strips of excavation drifts lava, characterized in that the center of Pallavi side of the array, which will be cut following extraction column, additionally rehadat backfill drift, which produces a full tab space between the Central rubble strip and rubble strip from the side of the array, while preparing the next post excavation carried out under the protection of the built rubble strips.