The fiber grouted material can reinforce the tension strength, shear strength as well as the index of fracture ductile, and remarkably improve the endurance of pre-stressed anchor rope under long-time loading. As a re...The fiber grouted material can reinforce the tension strength, shear strength as well as the index of fracture ductile, and remarkably improve the endurance of pre-stressed anchor rope under long-time loading. As a result, it has the better application foreground. Based on the shear log model and Hashin-Shtrikman upper and lower limited theorem, we have studied the mechanism of fiber grouted material applied in pre-stressed anchor rope and material property, and analyzed the effect of resistance strength of bond, resistance distribution of anchor section and the loading-deformation relationship of anchor body.展开更多
中空注浆矿用锚索用6.20 mm 2200 MPa超高强度钢丝因强度要求高,生产难度大,在生产时容易出现断丝,表面处理时采用盐酸两道次浸泡酸洗,酸洗后水冲洗采用先高压水冲洗再浸泡洗然后再高压水冲洗的方式,水冲洗后选用锌系高温快速磷化液,磷...中空注浆矿用锚索用6.20 mm 2200 MPa超高强度钢丝因强度要求高,生产难度大,在生产时容易出现断丝,表面处理时采用盐酸两道次浸泡酸洗,酸洗后水冲洗采用先高压水冲洗再浸泡洗然后再高压水冲洗的方式,水冲洗后选用锌系高温快速磷化液,磷化时间3~5 min,选用8道次拉拔。采用该工艺生产的钢丝能够满足产品的要求。展开更多
为了解决芦岭煤矿II82采区上山受剧烈动压影响、架棚支护效果差的问题,基于现场调研和锚杆轴力监测等手段,分析了锚索、锚杆的支护状况。结果表明:动压巷道中锚杆锚固力很容易衰减和丧失,52.6%的锚杆轴力都在40 k N以内;近70%的锚索出...为了解决芦岭煤矿II82采区上山受剧烈动压影响、架棚支护效果差的问题,基于现场调研和锚杆轴力监测等手段,分析了锚索、锚杆的支护状况。结果表明:动压巷道中锚杆锚固力很容易衰减和丧失,52.6%的锚杆轴力都在40 k N以内;近70%的锚索出现锚具滑移的现象,使得锚杆锚索对U型钢支架的结构补偿效果差,架棚支护难以控制动压巷道的剧烈变形。为此,提出新型中空注浆锚索高压注浆加固破碎岩体,配合双层锚网喷支护控制巷道剧烈变形的方法,监测发现巷道在掘进30天后顶板基本趋于稳定,顶板下沉量为26 mm,两帮变形量72 mm,底鼓量不足100 mm,满足了现场使用要求。展开更多
文摘The fiber grouted material can reinforce the tension strength, shear strength as well as the index of fracture ductile, and remarkably improve the endurance of pre-stressed anchor rope under long-time loading. As a result, it has the better application foreground. Based on the shear log model and Hashin-Shtrikman upper and lower limited theorem, we have studied the mechanism of fiber grouted material applied in pre-stressed anchor rope and material property, and analyzed the effect of resistance strength of bond, resistance distribution of anchor section and the loading-deformation relationship of anchor body.
文摘中空注浆矿用锚索用6.20 mm 2200 MPa超高强度钢丝因强度要求高,生产难度大,在生产时容易出现断丝,表面处理时采用盐酸两道次浸泡酸洗,酸洗后水冲洗采用先高压水冲洗再浸泡洗然后再高压水冲洗的方式,水冲洗后选用锌系高温快速磷化液,磷化时间3~5 min,选用8道次拉拔。采用该工艺生产的钢丝能够满足产品的要求。