最大效果测度值法研究矿井突水水源   总被引：2，自引：0，他引：2  

洪雷  彭华 《中国煤田地质》2002,14(2):45-46,73

为了快速准确地查清矿井突水水源，排除水患对生产的影响，利用最大效果测度值燕子山矿14-2＃煤层顶板砂岩裂隙水，其导水通道为工作面所在盘区发育的F23和F38正断层。最大效果测度值为矿井防治水工作提供了一个新的思路。  相似文献   

三李煤矿突水因素分析及堵水工艺探讨     

宋佩德  李公明 《中国煤田地质》2002,14(3):46-47,84

根据三李煤矿矿井地质及水文地质条件的分析，三李煤矿矿井突水水源应该是来自二1煤直接底板太原组上段L7－8灰岩岩溶溶裂隙含水层。为探明突水通道，采用“先探后堵，探堵结合，堵源为主”的治理方案，查明了该次突水的主要通道是：“通过煤层而未经任何材料封闭的钻孔^[1]。经对此处实施了钻孔注浆后，恢复了矿井生产。  相似文献   

涡北井田环境水文地质特征研究   总被引：3，自引：0，他引：3  

张平松  黄芳友等 《中国煤田地质》2002,14(4):44-46,49

以涡北井田勘探阶段的地表水，地下水采样分析资料为基础，利用综合水质指数评价方法对该井田各含水层的水环境质量现状作出评价，获得了各含水层水环境质量等级分级结果。并就井田开发后对水环境的质和量的影响进行了预测分析，指出矿井开发必须注重整个矿区水资源的合理利用与管理。  相似文献   

推覆体下特厚煤层开采的特殊地质灾害问题     

张五兵  王小玲 《中国煤田地质》2002,14(4):55-56

新集二矿13-1煤为新生界松散层、推覆体下第一开采的特厚煤层,存在着与推覆体发育有关的隐伏构造裂隙水、离层裂隙水(气)、F02断层活化导水、冲击地压造成导水裂隙扩展等特殊的地质灾害问题。针对这些安全隐患,提出了留设防水煤柱、对离层空间充填注浆、选择合理的开采方案、加强采前探测等措施。  相似文献   

Possible Carbonate Origin of Ore Sulfur from Geumseong Mo Deposit, South Korea     

Shunso ISHIHARA  Yoshimichi KAJIWARA  Myung–Shik JIN 《Resource Geology》2002,52(3):279-282

Abstract: In order to know the cause of the high δ³⁴S values of the Korean ore deposits (Ishihara et al., 2000), Geumseong molybdenum skarn deposit and related Jurassic granitoids and Cambro-Ordovician carbonates were selected for the δ³⁴S analyses. Two sulfide samples occurring in hydrothermal veins in fresh granitoids quarry at Songhaksan yielded δ³⁴S values of +6.9 and +8.8 permil. These are slightly higher than +5.3 permil δ³⁴S of the averaged rock sulfides for the Jurassic Daebo granitoids. Pyrite and molybdenite from the Geumseong deposit vary from +8.6 to +11.5 permil (average + 10.7 permil). The intruded carbonates contain very low amount of SSS (structurally substituted sulfate) as 2.9 to 8.1 ppm with high δ³⁴S values between +28.8 and + 40.0 permil, and sulfides sulfur of 52 to 779 ppm with variable δ³⁴S values between +3.2 and +22.5 per–mil. It is concluded that sulfur of the host carbonates was extracted and migrated into the skarn deposit at the time of the granitoid intrusion and the related hydrothermal convection, on the basis of the location of the skarn deposit occurring between the carbonates and Jurassic granitoids, and of very low contents of SSS sulfur in the carbonates. A part of SSS possibly contaminated into the Jurassic granite.  相似文献   

Productivity optimisation in weak sedimentary formations for improved coal production and roof stability—an approach     

V. M. S. R. Murthy  Santosh Kumar Ray 《Geotechnical and Geological Engineering》2002,20(3):273-290

Far-field peak particle velocity (PPV) measurements were made in the roof while blasting in coal development drivages at Tandsi Mine, Western Coalfields Limited, India. The roof was fragile at this mine and was posing constant support problems for mining, resulting in low productivity. The PPV measurements have been used to decipher the damage zone in the roof. The extent of damage obtained has been compared to establish the threshold limits for the damage zone. Conversely, the maximum charge per delay that can be exploded is calculated and a suitable blast design has been recommended for maintaining the roof stability and pull. A roof vibration predictor equation has been developed that shows a consistent trend indicating that it may have future use in a similar geo-mining setup. The blast pattern recommended has reduced the damage extent, though marginally, but helped in improving pull. Critical PPV for incipient rock damage in underground coal mine development drivages under fragile roof were computed. The PPV level for incipient crack growth was found to vary from 500 to 800 mm/s while for overbreak it varied from 800 to 1200 mm/s. It was also observed that the location of cut holes, charge concentration and firing sequence were found to be responsible for the difference in their damage potential.  相似文献   

云南金平县铜矿山地区超基性-基性岩体含矿性探讨     

荣惠锋 《矿产与地质》2002,16(4):206-211

通过对铜矿山超基性 -基性岩体的岩体化学成分分析 ,提出该区寻找小型深部熔离铜镍硫化物矿床的可能性  相似文献   

建立数字城市、数字矿区和地理信息系统     

宁永香  安润莲 《测绘与空间地理信息》2002,25(2):42-43

阐述城市数字化 ,矿区数字化 ,地理信息系统以及它们之间的关系 ,讨论了建设数字矿区重要子集之一———数字矿山的必要性及其战略意义  相似文献   

面向地质建模的三维体元拓扑数据模型研究   总被引：27，自引：0，他引：27  

侯恩科  吴立新 《武汉大学学报(信息科学版)》2002,27(5):467-472

在对地质对象的基本特征和计算机三维地质建模的基本要求进行讨论的基础上，提出了面向对象的三维体元拓扑数据模型。在该数据模型中，用面向对象的方法将地质对象抽象为点、线、面、体，体类又进一步划分为复合体、复杂体、简单体和体元四类。对所有对象类设计了12种拓扑关系和相应的数据结构。  相似文献   

利用钾长石尾矿制备矿物聚合材料的实验研究   总被引：32，自引：1，他引：32  

马鸿文  凌发科等 《地球科学》2002,27(5):576-583

以福建沙县田口钾长石尾矿粉体为主要原料，以煅烧高岭石作配料，硅酸钠作结构模板剂，氢氧化钠作激活剂，进行了制备矿物聚合材料的实验研究，实验样品静置固化7－28d，其抗压强度高达19.4-24.9MPa。耐酸性，耐碱性指标均优于相似建材的国家标准。在配料组成中，控制高岭石用量为20％，适当提高硅酸钠的用量和固／液化，有利于提高制品的力学性能。实验表明，材料抗中度随固化时间的延长而叶抛物线式发展，矿物聚合材料的形成过程为：铝硅酸盐固体组分的溶解络合，分散迁移，浓缩聚合，脱水硬化。由铝硅酸盐凝胶相固化而在的基体相，其化学组成与沸石相近，微观结构极可能与蛋白质类似，物理形态上呈三维网状结构，将未溶解的晶质颗粒胶结为坚硬块体，是矿物聚合材料获得良好力学性能的结构基础。  相似文献