近日，全球最大的焊接及切割设备、系统和材料的制造商与供应商伊萨推出了针对中国市场的新款Weld M系列表面暗化处理不锈钢焊丝（包括Weld M 308LSi和Weld M 307Si等）。新款焊丝拥有较高性价比和卓越性能，能较好地满足国内中端市场...近日，全球最大的焊接及切割设备、系统和材料的制造商与供应商伊萨推出了针对中国市场的新款Weld M系列表面暗化处理不锈钢焊丝（包括Weld M 308LSi和Weld M 307Si等）。新款焊丝拥有较高性价比和卓越性能，能较好地满足国内中端市场用户的应用需求，进一步完善和丰富了伊萨焊丝产品线。展开更多
全球最大的焊接及切割设备、系统和一材料的制造商与供应商伊萨，于今日推出针对中国市场的新款Weld M 308LSi不锈钢焊丝。新款焊丝拥有较高性价比和卓越性能，能较好地满足国内中端市场用户的应用需求，进一步完善和丰富了伊萨焊丝产...全球最大的焊接及切割设备、系统和一材料的制造商与供应商伊萨，于今日推出针对中国市场的新款Weld M 308LSi不锈钢焊丝。新款焊丝拥有较高性价比和卓越性能，能较好地满足国内中端市场用户的应用需求，进一步完善和丰富了伊萨焊丝产品线。作为百年焊接品牌，伊萨将持续创新研发：为客户创造高效、安全、优质的焊接体验；引领中国不锈钢焊材市场趋向标准化及规范化。展开更多
Steel mesh is used as a passive skin confinement medium to supplement the active support provided by rock bolts for roof and rib control in underground coal mines. Thin spray-on liners(TSL) are believed to have the po...Steel mesh is used as a passive skin confinement medium to supplement the active support provided by rock bolts for roof and rib control in underground coal mines. Thin spray-on liners(TSL) are believed to have the potential to take the place of steel mesh as the skin confinement medium in underground mines.To confirm this belief, large scale laboratory experiments were conducted to compare the behaviour of welded steel mesh and a TSL, when used in conjunction with rock bolts, in reinforcing strata with weak bedding planes and strata prone to guttering, two common rock conditions which exist in coal mines. It was found that while the peak load taken by the simulated rock mass with weak bedding planes acting as the control sample(no skin confinement) was 2494 kN, the corresponding value of the sample with 5 mm thick TSL reinforcement reached 2856 kN. The peak load of the steel mesh reinforced sample was only2321 kN, but this was attributed to the fact that one of the rock bolts broke during the test. The TSL reinforced sample had a similar post-yield behaviour as the steel mesh reinforced one. The results of the large scale guttering test indicated that a TSL is better than steel mesh in restricting rock movement and thus inhibiting the formation of gutters in the roof.展开更多
文摘全球最大的焊接及切割设备、系统和一材料的制造商与供应商伊萨，于今日推出针对中国市场的新款Weld M 308LSi不锈钢焊丝。新款焊丝拥有较高性价比和卓越性能，能较好地满足国内中端市场用户的应用需求，进一步完善和丰富了伊萨焊丝产品线。作为百年焊接品牌，伊萨将持续创新研发：为客户创造高效、安全、优质的焊接体验；引领中国不锈钢焊材市场趋向标准化及规范化。
文摘Steel mesh is used as a passive skin confinement medium to supplement the active support provided by rock bolts for roof and rib control in underground coal mines. Thin spray-on liners(TSL) are believed to have the potential to take the place of steel mesh as the skin confinement medium in underground mines.To confirm this belief, large scale laboratory experiments were conducted to compare the behaviour of welded steel mesh and a TSL, when used in conjunction with rock bolts, in reinforcing strata with weak bedding planes and strata prone to guttering, two common rock conditions which exist in coal mines. It was found that while the peak load taken by the simulated rock mass with weak bedding planes acting as the control sample(no skin confinement) was 2494 kN, the corresponding value of the sample with 5 mm thick TSL reinforcement reached 2856 kN. The peak load of the steel mesh reinforced sample was only2321 kN, but this was attributed to the fact that one of the rock bolts broke during the test. The TSL reinforced sample had a similar post-yield behaviour as the steel mesh reinforced one. The results of the large scale guttering test indicated that a TSL is better than steel mesh in restricting rock movement and thus inhibiting the formation of gutters in the roof.
