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能动地采用单一钻探手段探采的兴隆庄煤矿和和综合勘探手段探采的济宁二号井进行探采比较和对各研究区的煤发阶段、分网度进行统计对比工作,客观地评价了山东石炭二叠纪阶段利用综合勘探方法,特别是利用数字地震对煤层观察结构类型控制的手段,就能基本查明含煤面积及煤厚,。并对地震的研究方向提出了要求。 相似文献
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通过对采用钻探单一手段的兴隆庄煤矿和采用综合勘探的济宁二号井的探采对比,客观评价了原植查报告的勘探程度,提出了今后煤田地质勘探应采用以数字地震为主的综合勘探,并对地震的研究方向提出要求。 相似文献
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常德甘地地面高精度磁测△Ｔ异常与该地基性岩体有极好的对应关系，钻探验证△Ｔ异常新发现的橄辉玢岩是与金伯利岩相关的岩石之一，建议采用物化探方法到有利的红层分布区普查金刚石原生矿。 相似文献
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“七·五”期间,湖南省地矿局计算机应用于物化探数据处理、区域地质调查数理统计、矿产资源总量预测、受控定向钻探、地下水动态数据库、洞庭湖资源信息系统、发射光谱计算机译谱仪、矿产储量数据库、矿产资源开发管理系统等。展望在固体矿产勘查评价、地质矿产信息系统和计算机绘图与图示技术方面,将有比较迅速的发展。 相似文献
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通过对1：20万水系沉积物测量异常的分析研究，As64号异常有进一步工作价值，用1：5万水系沉积物、1：1万土壤和1：5000岩石测量进行查证，在石英正长班岩体内圈定了矿化带，通过钻探、槽探和坑探揭露，发现含金矿体9条。 相似文献
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昆明地热田的成因与外延 总被引：1，自引：1，他引：0
在昆明地热田外围万溪冲成功钻探深度2 001.6m,井口水温55℃,涌水量1 230m3/d的探采结合井。通过此次钻探研究验证了对云南省层状热储形成规律的认识,一是在碳酸盐岩地层埋深足够大,按地温梯度推算碳酸盐岩热储层温度达到45℃以上的地段,均具有钻凿可利用的地热水井的地热地质条件,尤其是在断陷盆地中;二是震旦系上统灯影组和下寒武统渔户村组碳酸盐岩地层分布稳定,其中的不整合面、断裂构造是深层承压水传输的通道,形成了地热水深远程径流,导致了深岩溶发育,因此是普遍存在的地热水储层。根据以上认识和本次勘探取得的新突破,结合研究区的地质、水文地质资料进行分析推断,将昆明地热田东南边界由呈贡吴家营附近向南推进至晋城镇南边,外延20余km。 相似文献
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老鸦巢金矿床原是一个铅锌老矿山,经研究发现在贫铅锌贡铁矿矿体中伴生自然金构成独立金矿床。勘探金矿时利用已有坑道,配合坑内水平钻探。为选取合理钻探口径,在已有穿脉进行采样模拟试验,结果表明7×3cm刻槽样与φ75钻进的岩矿心样相当,从而采用φ75坑内水平钻代替坑探圈定矿体,加快勘查周期,节约了费用。通过网度试验表明,40×25m网度求取C级储量是合理的。 相似文献
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J. William Miller 《Mathematical Geology》1989,21(5):559-578
Four statistical models have been developed to aid in exploration drilling for ore deposits. The Austinville (Virginia) deposit, which is a Mississippi Valley-type deposit with 31 million metric tons of ore in 17 ore bodies, provides the data base. Because most ore bodies are not solid ore, holes drilled through them will intersect sub-ore mineralization as well as ore. The statistical models were designed to show whether drilling is through an ore body or not, depending on the mineralization intersected by holes. The models are based on a threefold classification of mineralization penetrated by surface drill holes and were developed for cases of fixed budgets with specified number of drill holes and floating budgets with variable number of drill holes. Two classifications were used: (1) binomial ore/non-ore classification and (2) trinomial ore/mineralized/barren. For the fixed budget model with the ore/non-ore classification, at least five holes need to be drilled to decide whether or not an ore body has been penetrated. For the fixed budget model with the ore/mineralized/barren classification, and for both floating budget models, at least three holes need to be drilled. All decisions are based on a 90% confidence level. 相似文献
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龙口北皂矿海域下H2106综放面井下导高观测 总被引：3，自引：0，他引：3
水体下采煤需要观测采场覆岩导水裂缝带高度(简称导高)。龙口北皂矿海域H2106综放面地表为海水,为了解决地表海水区难以施工导高观测钻孔的技术难题,在井下采用仰斜钻孔与井下导高观测仪进行了导高观测,该方法钻孔工程量小且观测精度高。在H2106综放面共设置3个观测剖面,施工了4个采前对比观测钻孔和8个采后导高观测钻孔,并利用顶板覆岩中泥灰岩含水层开采前后其含水量的变化判断导水裂缝带上限。实测得出H2106综放面导高值为38.8m,导高与采厚比为9.5。对于龙口矿区软弱岩层,导高观测的最佳时段为采后10~20d。 相似文献
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J. William Miller Jr. 《Mathematical Geology》1991,23(2):201-218
A computer simulation method has been developed to find efficient drilling grids for mineral deposits. A well-known ore deposit is used as a model to develop an efficient pattern for undiscovered ore bodies in the same area or in other prospects where similar geometry is suspected. The model for this study is the Austinville, Virginia deposit, a Mississippi Valley-type deposit composed of 17 ore bodies totaling 34 million short tons (30 million metric tons). The method employs a computer program that simulates drilling the model deposit with different patterns, including various levels of follow-up drilling. Follow-up holes are drilled in fences at one half the original spacing around holes in the grid that show ore-grade mineralization. Each pattern is drilled 100 times from random starting locations to provide a range of outcomes of drilling, including the best, worst, and most likely. For this study, patterns of 100 drill holes were composed of 10 fences spaced 1000–5000 feet (305–1524 m) apart, each with 10 holes spaced 200–1000 feet (61–305 m) apart. In all, 25 grids were used with zero to three levels of follow-up drilling. The 600/2000 grid, with drill holes spaced 600 feet (183 m) apart in fences spaced 2000 feet (610 m) apart, was compared with the 200/5000 grid because they represented contrasting outcomes. The 600/2000 grid penetrated many ore bodies consistently but with few multiple hits to individual ore bodies; whereas the 200/5000 grid inconsistently penetrated few ore bodies with many multiple hits. The 600/2000 grid was more efficient than the 200/5000 grid at hitting large ore bodies of 1,000,000 short tons or greater (900,000 metric tons or greater) and was made more effective by adding one cycle of follow-up drilling. The 600/2000 grid had a 97% chance of hitting one or more large ore bodies with at least one drill hole per ore body, and the 200/5000 grid had a 64% chance. Once hit, there was an 82% chance that the largest ore body would be penetrated by three or more holes when using the 600/2000 grid and an 88% chance using the 200/5000 grid. 相似文献
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青海省格尔木市铜金山矿区是青海省2016年实施的11个绿色勘查示范项目之一。以该矿区为例,在钻探施工中,根据工程概况,选择具体的绿色勘查技术方案,形成可复制、可推广的经验做法。通过分析可以得到,绿色勘查技术在海拔高、自然条件恶劣、植被稀疏的地区可以应用,并且在设备选用、道路修筑、施工区及生活区修建等辅助工序方面总结可供推广的经验。同时,由于矿区的局限性,在环保型冲洗液的使用等影响钻探施工的核心技术方面还需进一步研究。 相似文献
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煤层顶板导水裂缝带发育高度是煤矿设计部门在留设防、隔水煤柱时必须考虑的一个重要参数,对煤矿水体下采煤、顶板防治水具有重要意义。基于双阳煤矿水文地质补充勘探项目,在8#煤层采空区上方施工两个地面钻孔,采用地面钻孔钻井液漏失量实测法、钻孔电视摄像技术及传统经验公式法相结合的方法,综合确定8#煤层顶板导水裂缝带发育高度为43.7~45.7m,为地质条件相似矿区在合理确定开采上限、留设防（隔）水煤柱等问题提供方法和数据支持。 相似文献
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以往陡倾型金属矿勘查钻孔的见矿率较低,查找无矿钻孔出现的原因及提高钻孔见矿率成为陡倾型隐伏金属矿勘查的关键。本次通过陡倾型隐伏铜矿的勘查,对陡倾型隐伏金属矿的无矿钻孔出现的原因进行分析,以期有助于以后陡倾型金属矿床的高效勘查。根据岩矿石的物性特征,选择激电中梯、激电测深综合物探方法,进行钻探验证,分析发现无矿钻孔主要是由矿体倾向发生反转和矿化不均一两种原因造成的。建议在分析确定好作为物探资料解译约束条件的深部金属矿体物性特征的前提下,选择适宜的电法、磁法、重力等地球物理扫面和测深综合物探方法进行陡倾型隐伏金属矿的前期勘查,主要利用附近钻孔有无矿化或利用物探测深的矿致异常有无间断来判断矿体矿化是否均一,利用物探扫面矿致异常的位置或附近钻孔钻遇的矿体倾向特征及井中物探来判断矿体倾向是否发生反转。另外,为提高陡倾型隐伏金属矿钻孔见矿的可能性,建议多施工一些倾角较小的钻孔。 相似文献