Jade depression solid iron ore mining approach an

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Jade depression iron ore mining approach and support optimization of stability

Should be. Support parameter optimization approach is based on selected categories of ore, ground pressure on the limited features and services dragonfly. Support to select the appropriate parameters. Supporting practice with mine. Support parameters on the current partial adjustment will puffanchor divided into (A), (B) and (c) three levels, as shown in Table 5. Investment and stability, according to the key factors to avoid the road. Optimization of support parameters options shown in Table 6. Symbol \\Time effect refers to the extraction conditions to keep the deadline approaches. Medium and stable rock, such as diorite, limestone and marble, using spray 50mm plain concrete support. Poor rock solid, anchor with spray, spray thickness 80mm. Such as the weakly altered diorite and clip a small amount of limestone Wong, marble. Not solid rock, such as magnetite, altered diorite and altered limestone, normal pressure, the use of spray Anchor (A) support; residual column to pressure, the use of shotcrete with (B) and 25U common retractable steel support bracket. Extremely solid rock, such as skarn, altered diorite fracture zone and sulfur magnetite recovery to normal pressure, the use of shotcrete net (c) support; residual column to pressure, the use of spray Anchor (c) and 25U steel supports common support. Spray thickness 1O0 ~ 120mm, in two jet completed. V. Conclusion, withdrawal base load strength measurement, the distance between ore joint measurement, the use of indicators of strength and joint spacing, hoop machine event inclusive relationship with the various kinds of ore and rock engineering quality quantitative classification. Constitute the fundamental basis for supporting choice. 2, the residue on the sub-columns, load bearing strata on both. Bian 2, 1994, and the rule of mine design and construction of 19 plate 5 approaches breathing of fish decline mutual support parameter injection every rumor Tanzania beetle earthenware jars are ceramic support rod type of disc thickness of the length of pitch diameter ductile spray drawer degree of fragmentation in diameter net label (mm ) (d Ⅱ n (mm) (m) (pumping × towels) (∞) (m × m) (III Xm) jet spray roller concrete measures -------- 2,005,050 2008030 ∞ 1.6】 .2 × 1.2 Spray Special ridicule () 20030 ∞ 1.61.O × 1.060.2X0.21.4X3.O Tut measures network (n) 20010030431.60.8 × 0860.2 × 021.1 × 3.O Tut wrong indiscriminately (c) 200l00 ~ 1203031.6O.6 × 0.66O.2 × 0.21.4X3.0 decline 6 Route Optimization support parameter residual column of ore project in the amount of pressure rise when the class asked the mirage effect (castor seed) characteristics of the main support of ore surplus parameter selection I2.0 free long hidden rocks, limestone, too Robinson of rock concrete blast} + weakly altered diorite I2.O Wong spray a small amount of limestone protracted folder , but unfortunately too spray of rock Network () 1.5 magnetite, erosion Luan diorite rock spray corrosion measures were Luan Network (color), 25U actinium 1.5 skarn soft interlayer, altered diorite break puffanchor (c) + broken belt, high spray cans with magnetite chi (c), 25U steel with a range of at small. stress is concentrated, is the next segment into the road causing a major cause of instability. through border control and mining Recovery log analysis to determine the scope of residual plume, as an important support for selected tangled. 3, combined with the specific conditions of Mining, on the approach to analyze stability factors, develop a rock by ore classification, characteristics and time effect of pressure options support parameters of the approaches support optimization program to improve the effectiveness of the support. References [1] M., Sut, SesledMethodhDe | ermi ~ sPom! L is called d $ 1ren6th, 1.J.RockM ~ ch.M. sd.8LG ∞ m Ferret. Ahstr.v \] lldPal Chong m, the volume of joint spot method to calculate a measurement of rock mass joint degree of development of an effective and simple method. overseas project to Building Research, Wang Huizhi translation. Geological Publishing Mu, 1986, 4B at ~ 475 (continued from page 13 ) conditions of testing and sampling to determine. combined study determined that some of the imperfections of which should be funded in the original 5, the conclusion on the basis of supplementary material. in order to ensure sufficient sampling design of mining law requires the main basis for sampling design system data points basis, the recovery of the samples is consistent with geological features, a test of the value depends on the purpose and requirements and meet the corresponding mining appropriate program (planning) and test requirements, from the geological data should be, mining Programme (Planning) for integrated plant design and construction for the Xuanye provide a reliable basis.
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