羊东矿煤巷掘进全锚索支护技术研究

Study on full anchor support technology in coal roadway excavation of Yangdong Mine

为解决羊东矿8270掘进工作面巷道支护难题,首次创新应用全锚索支护技术,并通过数值模拟试验对全锚索支护技术下的巷道围岩稳定性进行分析,将原设计煤巷掘进4根顶锚索配合顶锚杆加梯形梁联合支护布置,改为全锚索(长短锚索配合),通过分析巷道应力位移云图及围岩变形值,得到巷道顶板最大下沉值为53.52 mm,两帮移近量最大为74.9 mm,顶板下沉值与两帮移近量较小,巷道围岩较稳定,此支护方式能有效控制围岩变形。全锚索支护成本小于锚索+锚杆支护成本,实现了巷道经济安全高效掘进。

In order to solve the problem of roadway support in No.8270 heading face of Yangdong Mine,the full anchor cable support technology was innovatively applied for the first time,and the stability of roadway surrounding rock under the full anchor cable support technology was analyzed by numerical simulation test.The results showed that the original design of four roof anchor cables combined with roof bolt and trapezoidal beam combined support layout,the support form was now changed to full anchor cable(long and short anchor cable coordination).By analyzing the stress displacement cloud diagram roadway and the deformation of surrounding rock,the maximum subsidence value of roadway roof was 53.52mm,the maximum displacement of two sides was 74.9 mm,the maximum subsidence value of roof and the displacement of two sides were small,and the surrounding rock of roadway was stable.This support method could effectively control the deformation of surrounding rock.The cost of full anchor cable support was far less than that of anchor cable+bolt support,which realized the economic,safe,fast and efficient tunneling of roadway.