Mine bolt mine anchor is a tool for determination of the anchoring force, small size, light weight, easy to carry, simple operation, and security features, widely used in coal, defense, tunnel and transport mining anchor A variety of the tunneling operation; hollow grouting anchor suitable for the middle-geological conditions, the permanent support and advance support. The mine bolt by The hollow rod pressure grouting bolt, up to the consolidation of broken rock, cut off groundwater and rod preservative purposes, can quickly form a supporting force to control the stability of the surrounding rock. (1) hollow design, the function of the grouting. ② the grouting is full, and can realize the pressure grouting. ③ rod centered mortar full length of the bolt body wrapped, to avoid the possibility of corrosion, the purpose of long-term support. The ④ Mining anchor easy installation, without on-site processing thread, you can facilitate the installation of the plate and nut. (5) the anchor head, using up the exhaust exhaust problem completely solved the hollow grouting anchor above the horizon. ① role of anchor suspension: mining bolt through the weak, loose, unstable rock and soil anchoring in deep best of rock and soil stability, provide sufficient tension overcome slipped the dead weight of the rock and soil and sliding force to prevent wall slip, slump. (2) extrusion reinforcement role: Mining anchor force formed around within the compression zone. Ore arranged in a suitable manner, so that the adjacent bolt are each formed with a bolt to the compression zone overlap each other to form the compression zone. Compression the loose strata through bolt band reinforcement, enhance the integrity of, and increase the carrying capacity. ③ composite beam (arch): Bolt certain depth into the formation, among the strata anchoring force extrusion layer between the skin friction increases greatly reduced internal stress and deflection, equivalent to a simple superimposing several layers of the beam (arch) into a composite beam (arch). The flexural stiffness and strength of composite beam (arch) was greatly enhanced, thus increasing the carrying capacity of the strata. Bolt anchoring force the greater the role of the more obvious. ④ mine anchor length: bolt can effectively play its role in accordance with the design, when the required total length. Calculated by the role of the suspension, the anchorage length of the and reinforcement length exposed length. Composite beam (arch) role, and height of 1.2 times the composite beam (arch) and the exposed length. The actual values, you should also consider the the excavation contour uneven additional length. ⑤ anchorage length: Bolt anchored into the stable formation of length, according to the experience of selected or calculated to select. Experience, select, consider anchoring methods and bolt diameter. According to the calculation is selected, consider the bond strength of mortar and anchor and mortar and the cohesive force of the pore walls. ⑥ reinforcement length: the height of the suspension of the unstable rock along the bolt direction, or surrounding rock load height can also be used the sonic testing techniques such as measuring the thickness of the loose circle of methods to determine. 30kg Road plywood hydraulic Bend Vertical switchman ⑦ mine anchor Pullout Test: the inspection bolt construction quality, one of the anchor pullout force was measured. Bolt tension meter or torque wrench before the bolt was not sprayed concrete overlay directly measured. After the bolt is clamped, the slow uniform pressure, until the gauge readings to achieve the value corresponding with the design value, or the bolt loosening until, generally without destructive testing. In bolt shotcrete coverage, Mine bolt with a bolt detector proved mining anchor dig further determination. Anchor quantities tested 30 ─ 50 meters long each cavern or 300 bolt sampling groups of not less than three, mine uniformly selected checkpoint within the same section of a row of anchor bolt should . Forthright with solid, Shandong Jining City Zhuoxin Mining Equipment Co., Ltd. adhering to visit our company, invited experts, leading, guiding, enlighten, and look forward to sincere cooperation with you, "the pursuit of excellence is always our theme, we will good governance and create efficient, and strive to the state-of-the-art technology, excellent product quality, provide multi-faceted services for coal mining enterprises. Contact: Jiangjing Li Mobile: 15653732939 Tel 0537 -2998821 Fax :0537 2,228,358 QQ: 1,970,907,860