CHN Energy Shendong Coal Group Co. , Ltd.
Inner Mongolia Coal Research Institute Co. , Ltd.

为了实现神东矿区综采工作面的无人化、少人化,降低工人劳动强度,以补连塔煤矿22406综采工作面为背景,采用理论分析计算与现场实测相结合的研究方法对工作面主运巷采用锚索主动式超前支护方式的科学性和合理性开展了研究,同时引用两侧实体煤巷道力学模型对主运巷专用锚索超前支护设计进行验证,通过验证“排距3m,每排2套”的超前支护形式满足工作面超前支护要求。通过主运巷道超前支护段锚杆(索)受力监测可知,工作面推进过程中,超前支承压力的影响范围约为42m,在距工作面10~26m范围,超前支承压力增加幅度较大,应力集中系数为1.23~1.5。通过巷道围岩表面位移监测可知,主运巷在距离回采工作面35m左右受采动影响开始变形,回采过程中,顶板最大下沉量达到16mm,底板最大底鼓量达到42mm,两帮最大移近量达到45mm。研究结果表明,采用锚索补强超前支护方式,巷道围岩得到有效控制,围岩整体稳定且变形可控,现场应用效果良好。

In order to achieve unmanned and understaffed fully mechanized mining face in Shendong mining area, and reduce the labor intensity of workers, based on the conditions of 22406 fully mechanized working face in Bulianda Coal Mine, we studied the scientificness and rationality of active advance support of anchor cable in the main roadway of the working face by combining theoretical analysis and field measurement. Based on the supporting model of solid coal roadway on both sides and the calculation and analysis of relevant parameters, we verified that the advancing support form of “row distance of 3 m, 2 sets per row” between the special anchor cable designed for the main roadway roof and the original support met the requirements of the working face advance support. According to the force monitoring of the anchor bolt (cable) in the advance support section, the influence range of the advance abutment pressure was about 42 m, the advance pressure was larger in the range of 10~26 m away from the working face, and the statistical stress concentration coefficient was 1. 23~1. 50. According to the displacement monitoring of the surrounding rock surface, the main roadway began to deform under the mining influence at about 35 m from the working face. During the mining, the maximum roof subsidence was 16 mm, the maximum floor heave was 42 mm, the maximum side-to-side convergence was 45 mm. The surrounding rock deformation was effectively controlled using the anchor cable reinforcement advance support.

中国神华能源股份有限公司神东煤炭分公司科技创新项目(E210100569)

杨俊彩, 范东林, 陈苏社, 等. 补连塔煤矿回采巷道锚索主动式超前支护技术应用 [J]. 煤炭工程, 2024, 56(2): 59-65.