SU903566A1 - Method of working thick gently-sloping coal beds - Google Patents

Description

(PLN) .1BODY DEVELOPMENT OF FASHIONABLE COGLES / LAYERS; .1 The invention relates to the mining industry and is intended for the development of thick flat coal seams, especially high-gas bearing, hazardous by dynamic manifestations of rock pressure, with a roof that is hard to break. There is a method of developing thin steep coal seams with wells without the presence of people in the bottomhole lj However, this method is not sufficiently effective. There is also known a method of developing powerful flat coal seams with a hard-to-crush roof at the same time with two inclined layers with excavated layers, including preparation of conveyor columns and transport and ventilation workings, leading the bottom layer of the lower layer to wells and subsequent development of the upper layer to the entire layer the remaining thickness of the seam with the G27 roof trimming. However, this method of development is characterized by insufficient efficiency and does not provide a high level of safety of operations. The purpose of the invention is to increase the safety and efficiency of the development. The goal is achieved by the fact that. the lower layer is excavated from additional workings that pass between the workings of the column being worked out, with the top of the upper layer being slaughtered by the bottom of the lower layer, no less than the length of the active gas recovery zone of the formation. In particular, additional production is carried out between the workings of the column being worked perpendicularly to the line of the bottom layer, and the lower layer is extracted from this workings with the exit of wells to the cut-off spaces passed along the workings of the column.

Additional workings between the workings of the column are located diagonally to the line of the bottom layer of the upper layer, and the excavation of the lower layer is carried out with the orientation of the wells parallel to the workings of the column;

As an additional development of the lower layer using conveyor production of the adjacent column. Following the bottom hole of the borehole on the side of the workings, they are sealed to isolate the lower layer and capturing of the released gas. FIG. 1 shows a diagram of the preparation of two adjacent pillars, for example, in a direction along the strike when the lower layer is excavated from an additional working place, which is located between the workings of the column perpendicular to the line of the cleaning layer of the upper layer, FIG. 2 - section A-A in FIG. 1, on; FIG. 3 shows a section BB in FIG. 1; FIG. K is a section B-B in FIG. 1, in FIG. 5 is a section of YYD in FIG. 1, in FIG. 6 is a diagram of the preparation and processing of two adjacent pillars in the direction along the strike during excavation of the lower layer from additional workings, located between the workings of the column diagonally to the line of the clearing of the upper layer; FIG. 7 is a diagram of the preparation and mining of three adjacent pillars also in the direction of the strike, when used as an additional development for excavating the lower layer of the conveyor tunnel of the adjacent column. Each pillar is prepared by conducting from the conveyor belt 1 and the rail rail 3 ramps (slopes) to the flank ventilation flange (slope) 3 conveyor drifts 4. The assembly chambers of the upper layer 5, transport and ventilation drifts 6 and additional openings 7 are also carried out. All workings are located on the soil of the reservoir. T-transport and ventilation drifts 6 pass, for example, the extension and the developed space of both of them behind the upper layer 8. The output 7 pb is kept behind the bottom of the lower layer 9 and is extinguished in the hole with the bottom of the upper layer 8. The lower layer 9 is worked off by drilling 10, for example, with the help of auger-type installations P. Between wells 10, | rt. ruptured by grrno

Claims (2)

Coal pillars 12 are applied to this pressure. The layer -9 is removed in both directions from wells 7 (or from Fig. 7) directly from the Mounting chamber 5 over the entire area of the column, leaving an undisturbed coal packet 13 between the wells 10 and the top of the formation, which ensures the stability of the lower layers of the roof in the bottom of the upper layer 8, ahead of this bottom, greater than the length of the zone of active gas recovery in the same column ((Eg. 1 and 6) or adjacent pillars (Fig. 7). from 50 to 80 m. The top layer. 6 work out For the rest of the power, for example, a mechanized complex. When implementing the method according to the scheme shown in Fig. 1, the undercut 9 is dredged from additional development 7 passed between drifts 4 and 6 perpendicular to the 8. The wells 10 are withdrawn into the subsectional spaces And along the drifts 4 and 6. The frontal spaces 14 extend to the full thickness of the reservoir and are secured, for example, by anchoring. They are formed either in the course of mining the column in front of the bottom of layer 9 or when conducting lines 4 and 6. Coal from the lower layer of the port is transported along its own conveyor line to the conveyor belt (slope) 1 or to the face conveyor of the bottom layer 8 In the latter case, a conveyor line of generation 7 (Fig. 1) includes an end mobile loader. 6, the bottom layer is worked out from additional openings 7 located diagonally to the bottom line 8, with the axes of the wells 10 being oriented parallel to the drifts 4 and 6 in the plane of the reservoir, and coal with which are overloaded onto the conveyor line aa, b of the upper layer 8. The adopted location of the additional workings .1 and 6J does not coincide | m with the bottom line of the upper layer 8, facilitate the conduct of work on their redemption and transfer of slaughter 8. According to V.A., shown in Fig.7. the recess of the lower layer 9 is made from the conveyor drift 4 of the adjacent column with the creation of a supporting strip 15 for 59 separation of works in the tops of the upper & and lower 9 layers. The drift C is used in this case as an additional development. In the first column of the excavation floor, the lower layer 9 in the area of the strip 15 is processed from the transport and ventilation drift 6 To the notch of the lower layer 9 in the adjacent column are present after assembling the conveyor drift C with the flanking ventilation shaft 3 (slope) 3 and providing ventilation due to general shaft depression . For transporting coal from the bottom layer 9, a sinking conveyor line is used. Following the bottom hole 9, the wellheads 10 are on the side of the workings 7 and are isolated, for example, by pneumatic bellows 16, the wells 10 are connected via gas intakes 17 to the megas-20 gas pipeline 18 and degassing the formation is carried out. As the active gas recovery ends, the air bellows 16 are removed from the well 10 and reused. According to the variant shown in Fig. 7, the wellhead of 10 wells, drilled down from the drift, is used for isolating it, for example, from a block of churak on an alumina solution. In the embodiment shown in FIG. 6, the wells 10, adjacent to the drifts t and 6, are isolated by pneumatic cylinders 16 along their entire length. One of the basic conditions for the effective application of the proposed method is to preserve the continuity of the lower layers of the roof of the reservoir during its lowering after the bottom of the lower layer 9f and therefore the stability of the roof in the bottom of the upper layer 8. This is achieved by leaving an undisturbed coal pack 13 between the wells 10 and the roof which may be considered as inter-area relative to the top of the formation. This method allows to significantly increase the safety and efficiency of the development of powerful flat plates. Particularly high efficiency of the method is achieved in the development of layers of high-gas, hazardous for gas-dynamic manifestations of rock pressure, with a hard-to-crush roof. Claim 1. Method of developing powerful flat coal seams, especially 6 high-gas-bearing, hazardous by gas-dynamic manifestations of rock pressure, with a hard-to-cut roof, simultaneously with two inclined layers with excavation of layers by pillars, including the preparation of pillars of conveyor and transport and ventilation workings, leading the bottom layer of the upper layer to the lower layer of the well and subsequent testing of the upper layer for the rest of the reservoir thickness with a roof collapse, characterized in that audio the safety and efficiency of development, a recess bottom layer produced from additional openings that extend between the workings executed by column ahead slaughtering slaughter upper layer of the lower layer is not less than the extension of the more active gas recovery zone of the formation. 2. The method according to claim 1, characterized in that the additional production is carried out between the workings of the column being worked perpendicularly to the bottom line of the upper layer, and the removal of the lower layer from this workings is carried out with the exit of wells into the near-surface spaces passed along the workings of the column and used as niches in the face of the upper layer. 3. Method pop.1, which is also distinguished by the fact that the additional workings between the workings of the column being worked out are located diagonally to the bottom line of the upper layer, and the excavation of the bottom layer is carried out with the orientation of the wells parallel to the workings of the column. k. Pop.1 method, distinguishing both - and c. the fact that as an additional generation for excavation of the lower layer, use is made of conveyor production of the adjacent extraction column. 5. The method according to paragraphs. L-t, characterized in that, following the bottom hole end of the well, from the side of the workings, they are sealed to isolate the lower layer and capturing of the evolving gas: Sources of information taken into account in the examination / 1. USSR Certificate of Authentication N-125787, cl. E 21 C iil / O, 1958. 2. USSR author's certificate in application number 1992161, cl. E 21 197 (prototype). li rafflff lil; i; hli Hbuн aajíh Biiijijipf te III iiiiiiiiiiii ... liliiiiiiitJHHnbHhbioiM ka IM / bu -A XI rx 6 17 W 6-6 U sixteen Fig.Z in-c 17 W FIG. Yr 5