东海煤矿深部巷道支护技术

煤矿深部巷道围岩压力大,超过其围岩的抗压强度。同时,采区巷道受动压的影响,巷道围岩变形破坏严重,影响正常生产。课题组采用优化巷道断面设计、加强关键部位支护强度、降低局部围岩应力等措施,使得围岩整体协调变形。现场实验表明,东海煤矿埋深1000m的巷道经受了两个回采工作面的动压影响,围岩受力状态良好,达到了预期目标。

Supporting technology of deep roadway in Donghai Mine

Surrounding rock in deep coal mine roadway is subjected to high pressure,exceeding the compressive strength of rock.At the same time,a bad deformation failure on the surrounding rock of roadway due to the influence of dynamical pressure on the roadway in mining area affects the normal production.This paper introduces our research team＇s efforts to accomplish coordinated deformation of the whole surrounding rock by adopting a series of measures,such as optimizing design of the roadway section,strengthening support of key parts and decreasing local stress on surrounding rock.Field experiment shows that,subjected to the dynamical pressure,the surrounding rock occurring in two working faces of the 1 000 meters-deep roadway of Donghai Colliery behaved better than otherwise would occur.