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- Relationship between height of inbreak zone and fracture zone and dip angle of steeply dipping coal seam has been discussed. 急倾斜煤层中冒落带和裂隙带高度随煤层倾角变化的规律已被褐示[7]。
- Crack unstable evolutive regular of steeply dipping coal seam due to synthetical mechanization top coal caving 大倾角综采放顶煤开采裂隙非稳态演化规律
- steeply dipping coal seam 大倾角煤层
- Steep dip coal seam 急斜煤层
- Study on Failure Laws of Surrounding Rock in the Steep Dip and Extra-thick Coal Seam Mining 急斜特厚煤层开采围岩破坏规律研究
- Precaution of deep roadways'floor heave in steep dip coal mine 急倾斜矿井深部巷道底鼓的防治
- Techniques and practice of longwall with top caving mining in soft and combustible coal Seam with steep dip, extra-thickness 急倾斜特厚松软易燃煤层综放开采技术与实践
- Water-coal mixture burst is a new mine disaster in exploiting steeply inclined thick coal seam mining. 摘要急倾斜厚煤层开采时发生的水煤体溃泄是一种新的矿井灾害。
- The example of the large dip angle and the coal seam group is the Yuexu area in Tangshan Mining Filiale. 大倾角、煤层群采煤设计以开滦唐山矿业分公司重点衔接区域岳胥区-680水平采区为设计对象。
- Alteration mylonite gold deposit, which is steeply dipping and narrow vein together. 河台金矿开采急倾斜、薄矿体、矿岩中等稳固的蚀变糜棱岩型金矿床。
- Coal miners; coal seams; coal haulers. 煤矿工; 煤层; 运煤工
- Resuing is used for mining the steeply dipping narrow-vein in the Shangzhou Gold Mine of Shaanxi,has made great success and excellent economic effect. 陕西商州市金矿采用削壁充填采矿法开采急倾斜薄矿脉,获得成功,取得良好的经济效益。
- Steeply dipping narrow deposits was stoped in the conditions of steady ore-rock,but partial unsteady becase split and jointed development. 自建矿以来一直采用浅眼留矿为主要回采方法,在减损降贫、间柱回采以及解决留矿采场中出现“空洞”等问题,作了很多试验,具有许多特点。
- Coal seams intermixed with iron ore. 煤层和铁矿混杂在一起。
- The gold rich ore bodies occurrs in the winding part of NNE trending fractures on strike and transforming part from steeply dipping to gently dipping on dip direction. 富金矿体在走向上一般分布于NNE向断裂的转折地段 ,倾向上分布于断裂产状由陡变缓的过渡部位。
- The Gaussian curvature of No.3 coal seam in Qinshui basin is calculated. 计算了沁水盆地3号煤层的高斯曲率。
- thin and thick seam with steep dip 急倾斜较薄厚煤层
- Factors affected coal seam permeability change and its law is analyzed. 分析了煤层透气性变化的影响因素及变化规律。
- The outburst-proneness of 6# coal seam are studied with five indexes. 采用5种指标对该矿6%23煤层冲击倾向性进行了实验研究。
- It trends nearly E-W and is a dissymmetrical anticline belt with steep dip angle in the north limb and gentle in the south. 该构造带走向近东西,为北陡南缓两翼不对称的隆起带,上部发育“塌陷式”地堑断裂系统。