Coal Engineering ›› 2023, Vol. 55 ›› Issue (5): 39-44.doi: 10.11799/ce202305007

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Research on the law of mining pressure appearance and control countermeasures in cross-roadway without coal pillar

  

  • Received:2022-04-15 Revised:2022-05-16 Online:2023-05-19 Published:2023-05-19

Abstract: Abstract: Based on the engineering background of 11101 transport passage in Qipanjing Coal Mine (east area), the law of roadway retaining pressure in cross roadway of medium thick coal seam is studied. In this paper, the stress distribution characteristics in the process of roadway retention are obtained by numerical simulation, and the surrounding rock support scheme and mine pressure monitoring scheme are put forward. The results show that: with the working face mining, the peak value difference of stress concentration on both sides of 11101 drainage lane at the intersection of roadway is increasing, and finally the peak value of stress concentration on the left side of roadway is greater than that on the right side. The roof at the roadway intersection is in a "weak stable" state relative to both sides of the roadway intersection, which is easily affected by the mining pressure of the working face. Through the field verification, the reinforcement support measures at the roadway intersection are reasonable and meet the expected requirements.

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