ANALYSIS OF PRODUCTION RISK FROM CRUSHES OF ROCKS AT EXCAVATION SITES, TAKING INTO ACCOUNT WAYS OF PROTECTION

I. Liashok, S. Podkopaiev, Y. Simonova, H. Boichenko, V. Dovhal, O. Tkachuk
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Abstract

Purpose. To assess the production risk of rock collapse in a deep coal mine to identify hazards in the workplaces of the excavation site, taking into account different methods of protection of workings. Methods. A comprehensive approach was used, which included: analysis and generalization of known research; expert evaluation; use of the basic provisions of probability theory and set algebra (Venn diagrams), the method of estimating the production risk of Fine-Kinney; processing, analysis and interpretation of the obtained results. Results. Problems and sources of industrial risk from rock collapses during maintenance of workings, risk-forming factors that contribute to the threat of dangerous events at the excavation site are analyzed. The decision-making model is considered, which is based on the description of situations when the production risk of the dangerous factor “landslides and collapses” in the maintenance of preparatory workings depends on the result of choosing an alternative method of protection of the retractable lane. For excavation sites under the same mining and geological conditions for all workplaces, the probability of receiving consequences from dangerous events due to uncertain conditions of their implementation has been established. It is fixed that the realization of this production risk is influenced by low reliability and inefficiency of the practiced methods of protection of excavations. Risk analysis is defined as the systematic use of available information to identify hazards in the maintenance of long workings. Novelty. A model for monitoring the production risk of rock collapses in excavations of deep coal mines is proposed, which allows assessing the dynamics of the threat at the stage of technical decisions related to the choice and justification of the method of protection of workings taking into account the interaction of risk factors. Practical significance. When formulating measures to reduce the risk of dangerous events at the excavation site, it is necessary to take into account that the production risk of rock collapse while maintaining the workings depends largely on the method of protection and effectiveness of technological measures.
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考虑保护措施的开挖现场岩石破碎生产风险分析
目的。在考虑不同工作面保护方法的情况下,对某深部煤矿塌方生产风险进行评估,识别采掘现场工作场所的危害。方法。采用综合方法,包括:对已知研究进行分析和归纳;专家评价;利用概率论和集合代数(维恩图)的基本规定,估计Fine-Kinney生产风险的方法;对所得结果进行处理、分析和解释。结果。分析了工程维护过程中岩崩工业风险存在的问题和来源,以及造成开挖现场危险事件威胁的风险形成因素。考虑了准备工程维修中“滑坡崩塌”危险因素的生产风险取决于选择可伸缩巷道的替代保护方法的结果的情况下的决策模型。对于所有工作场所在相同采矿和地质条件下的挖掘场地,确定了由于危险事件的实施条件不确定而受到危险事件后果的概率。可以确定的是,这种生产风险的实现受到了现有开挖保护方法可靠性低、效率低的影响。风险分析被定义为系统地利用现有信息来识别长期工作维护中的危险。新鲜事物。提出了一种深部煤矿采掘岩崩生产风险监测模型,该模型可以在考虑风险因素相互作用的情况下,在与工作面保护方法的选择和论证相关的技术决策阶段对威胁的动态进行评估。现实意义。在制定降低开挖现场危险事件风险的措施时,必须考虑到在维持工作的同时,塌方的生产风险在很大程度上取决于保护的方法和技术措施的有效性。
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