Comprehensive gas control method for fully mechanized caving face in three soft and extra thick coal seams

A fully-mechanized caving face and extra-thick coal seam technology, which is applied to gas discharge, earthwork drilling, mining equipment, etc., can solve the problems of gas affecting production safety and achieve the effect of ensuring safe production and production safety

CN110894794BActive Publication Date: 2022-02-01DATONG COAL MINE GRP
3 Cites 0 Cited by

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Publication Date
2022-02-01

Smart Images

  • Figure 1
    Figure 1
  • Figure 2
    Figure 2
  • Figure 3
    Figure 3
Patent Text Reader

Abstract

The present invention relates to the field of coal mining technology, in particular to a method for comprehensively controlling gas in fully mechanized caving working faces of three-soft and extra-thick coal seams; comprising the following steps: a, gas in the coal body of the pre-pumping working face of the bottom pumping roadway, b, smooth construction of the top pumping roadway Drainage of coal body gas through boreholes in the upper layer and drainage of goaf gas in closed roadways; c. Drainage in drilling holes in the return air lane of the working face; Drainage, the method of the present invention "adopts the three-dimensional space of the bottom suction roadway + the top suction roadway" to control the gas on the working face, which ensures the production safety during the excavation of the air entry and return airway, and avoids the occurrence of gas exceeding the limit; the construction of the bottom suction roadway penetrates layers Boreholes, top extraction roadways and gas drainage boreholes in the coal seam of the working face, as well as bedding drilling and oblique high-level drilling in the return airway to drain the gas in the coal body of the working face and the gas in the coal body of the upper corner, The gas problem during the recovery period of the working face has been well controlled to ensure the safe production of the working face.
Need to check novelty before this filing date? Find Prior Art

Description

Technical field

[0001] The present invention relates to the field of coal mining technology, and specific to a Gas Comprehensive Governance Method for Gas Face Face Face Face. Background technique

[0002] The successful application of comprehensive mining coal mining technology in the "three soft" unstable special coal seams created higher economic benefits for coal mines. However, with the improvement of the work surface, the absolute gas epituization is significantly increased, especially in the coal mining surface, the length of the gas is caused, and the coal seam coal is soft and frang, and the depth of depth is deepened. The pressure is getting bigger and larger, and the gas-drawn drilling hole in the coal seam is serious and the hole is difficult. It is unable to solve the Gas problem in the work surface. Safety production cannot be guaranteed. Inventive content

[0003] In order to solve the technical problems of the three soft-thick coal seams, the technical problems a...

Examples

Embodiment 1

[0024] In this example, the present embodiment is taken by Datong Coal Mine Group Co., Ltd. Xuangang Coal and Electric Coal Mine, Jiaojiazhai Coal Mine:

[0025] Jiaojiazhai mine 521 mining area is high gas production area, the work surface is arranged in the 5 # coal seam, 5 # coal seam is one of the main coal mining layers of our mine, the mine 5 # coal seam thickness is about 9.5-13.9 meters, an average of 11 meters The coal is soft, easy to break, and the Pu's factor is 0.2-0.4.

[0026] Due to the softness of the 5 # coal seam, with the deepening of the depth, the pressure is getting bigger and larger, the gas deposit drilling hole in the coal seam is serious and the hole is difficult, alone rely on the coal seam of water. Gas has Unable to solve the 52105 working surface gas problem.

[0027] In order to ensure the gas problem during the 52105 working surface, ensure the safety production of the work surface, in the following method, gas comprehensive management:

[0028] (1...