The Verkhnekamskoye potassium salt deposit located in the Perm Krai is the main source of raw materials for the potash industry in Russia. The penetration of underground waters into the shafts of the mine, which is situated beneath the industrial zone, and residential quarters of the city of Berezniki led to the flooding of the mine with subsequent collapsing of the earth’s surface. For obtaining the information about negative impacts of engineering processes associated with mineral mining operations, a method of highly accurate gravimetric monitoring observations is suggested, suitable for tracking the time changes of the gravitational field. As a result of monitoring observations we obtain a dynamic anomaly of gravity which is defined as the difference between the subsequent and the previous gravity values. Since all the unvarying components of the gravitational field are present in each pair of the observations, the dynamic anomaly only reflects a specific geological or mining process. The method for processing and interpretation of the dynamic anomalies of gravity, which synthesizes qualitative and quantitative approaches to extracting the geological information from gravity data, is developed. The interpretation yields the areal distribution and probable depth interval of the zone of rock decompaction and shows the magnitude of the change in the density of rocks characterizing the intensity of the decompaction process. The practical implementation of the highly accurate gravimetric monitoring observations is carried out in the emergency sites of the mines of the Verkhnekamskoye potassium salt deposit has demonstrated high efficiency of the suggested method.

中文翻译：

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岩土工程对地质环境影响重力监测数据解读

位于彼尔姆边疆区的 Verkhnekamskoye 钾盐矿床是俄罗斯钾肥行业的主要原料来源。地下水渗入位于工业区下方的矿井和别列兹尼基市的住宅区，导致矿井被洪水淹没，随后地表坍塌。为了获取与采矿作业相关的工程过程的负面影响信息，提出了一种高精度重力监测观测方法，适用于跟踪重力场的时间变化。作为监测观测的结果，我们获得了重力的动态异常，其定义为后续重力值与先前重力值之间的差异。由于引力场的所有不变分量都存在于每对观测中，因此动态异常仅反映了特定的地质或采矿过程。开发了重力动态异常的处理和解释方法，该方法综合了从重力数据中提取地质信息的定性和定量方法。解释产生了岩石分解带的面积分布和可能的深度间隔，并显示了表征分解过程强度的岩石密度变化的幅度。