Study On Safety Evaluation System Of Geological Drilling Holes

Geological drilling construction process have many complex factors of productionsafety, not only the environment of field work, geological and climatic factors, but alsouncertainty factors during construction work. With increasing depth of drilling, the risk ofgeological drilling are increased. The probability and processing difficulty of holesaccidents increase exponentially. There is a growing emphasis on the safety of geologicaldrilling holes. Therefore, the establishment of geological drilling holes safety evaluationsystem, which results geological drilling hole security state, has important implicationsfor geological drilling holes safety management.According to the relevant literature, this article will geological drilling holescommon accident divide into six categories and explain. Given the ambiguity andinvisibility of the geological drilling holes, Summary rapid identification methods ofgeological accident. In order to analyze the security status of the hole effectively, Thisarticle starts from the hole accident by comparing the cause analysis method of theaccident. Determine to establish the safety evaluation index system based on the fault treeanalysis. Based on the principles of evaluation system and fault tree analysis, fault treeanalysis on several common holes accident of geological drilling (broken drill accident,burying accident, stuck drill, burning drilling accident) and construct fault tree analysisdiagrams. According to the fault tree model, Neutralize basic event indicators and builtsafety evaluation index structure initially of sucker sticking accident. To avoid correlationand improve the combined effect of the evaluation system, Remove larger correlationindicators to determine the final evaluation chart relying on SPSS software of numericalanalysis method. In order to ensure the credibility and accuracy of the index weight,Application of improved AHP combined structural importance of fault tree analysis andtraditional analytic hierarchy to determine the index weight, reduce the influence ofsubjective factors personnel. At the same time, the accident of sucker sticking as anexample, This paper established a safety evaluation index system of sucker sticking accident.Given the security situation and production characteristics in the geological drilling,the fuzzy pattern recognition method is applied to evaluate safety evaluation indexsystem of geological drilling holes. Finally, the safety evaluation model of geologicaldrilling holes, derived the safety rating scale of geological drilling holes, has beenestablished. At last, three case studies confirmed the feasibility of safety evaluationsystem.