浅埋深煤层房采区下综采工作面动压控制技术

Control Technology of Dynamic Mine Strate Pressure of Fully- Mechanized Coal Mining Face Under Gob Left by Room and Pillar Mining of Shallow Depth Seam

为解决浅埋深煤层房采区下综采工作面受动载矿压影响的问题,以石圪台煤矿31201工作面为研究对象,在现场观测、微震监测及预测预报、矿压预测预报的基础上分析动载矿压事故发生的机理。结果表明:采场上覆采空区及集中煤柱受采动影响导致应力集中是动载矿压事故发生的基本原因,在矿压观测及微震监测的基础上采用钻探的方法探测集中煤柱分布范围,通过采取集中爆破的措施,从而达到上覆岩层阶段释放能量、动压分次化解的目的,该措施的实施确保工作面顺利通过上覆集中煤柱区域,避免综采工作面发生动载矿压事故。

In order to solve the problem induced by dynamic mine strate pressure of fully-mechanized coal mining face under gob left by room and pillar mining in shallow depth seam,taking No. 31201 coal mining face of Shigetai Mine as a study object,the paper analyzed mechanism of the accident occurrence based on field observation,micro seismic monitor and forecast,mine pressure prediction.The results showed that the basic reason of dynamic mine strate pressure was stress concentration induced by overlying goaf and concentrated coal pil-lar affected by mining,based on the observation of mine pressure and micro seismic monitoring,the paper detected oncentration of distribu-tion range of coal pillar by drilling method and adopted concentrated blasting measures to achieve the objective of stage to release energy, dynamic pressure resolve,through the implementation of the measures to ensure the working face mine the above affected zone by concen-trated coal pillar safety and avoid the occurrence of dynamic load of fully-mechanized coal mining face of mine pressure accident.