浅埋厚煤层综采强矿压显现机理及协同控制

Mechanism and Collaborative Control of Strong Pressure in Fully Mechanized Mining of Shallow Thick Coal Seam

为实现西部矿区浅埋厚煤层安全开采,建立采场数值模拟模型研究开采应力分布和覆岩破断结构特征,采用理论分析得到支架载荷和合理架型,提出顶板协同控制技术。研究结果表明:基本顶初次破断形成砌体梁结构,由于采空空间大,破断岩块下沉中结构活化易失稳,发生强矿压事故;提出支架优选、超前预警、超前疏放水、工作面调斜和控制回采速度等协同控制技术,现场实测发现ZY10800/28/63掩护式液压支架支撑稳定,能够较好适应开采条件。

In order to realize the safe mining of shallow and thick coal seam in western mining area,the numerical simulation model of stope was established to study the mining stress distribution and overburden fracture structure characteristics.The support load and reasonable support type were obtained by theoretical analysis,and the roof collaborative control technology was proposed.The research results show that:the masonry beam structure is formed when the basic roof is broken for the first time.Due to the large goaf space,the structural activation is easy to lose stability during the subsidence of broken rock block,and strong mine pressure accident occurs.The collaborative control technologies such as support optimization,advanced warning,water drainage in advance,slope adjustment of working face and control of mining speed are put forward.Field measurement shows that the support of zy10800/28/63 shield hydraulic support is stable and can better adapt to mining conditions.