17 results about "Ordovician" patented technology

This invention provides a method for expanding the functionality of directional boreholes for grouting in Ordos limestone aquifers. The method includes acquiring and analyzing mine hydrogeological data, determining the lithological structure characteristics, sedimentary characteristics, geological structural distribution parameters, and hydrogeological parameters of the coal seam floor, constructing a stratigraphic structure model, analyzing the hydrogeological parameters based on the stratigraphic structure model to determine the treatment strata in the Ordos limestone aquifer, analyzing the geological structural distribution parameters based on the stratigraphic structure model to determine the trajectory design parameters for the directional borehole, determining the function of the directional borehole according to the project objective and pre-defined directional borehole function classification information, and designing the directional borehole corresponding to the treatment strata and / or the borehole trajectory design parameters. This method refines the functional classification of directional boreholes, provides design methods for directional boreholes with different functions, expands the functionality of directional boreholes, and makes the surface area treatment technology for Ordos limestone water hazards more comprehensive, applicable, and targeted.

The invention discloses a process and effect evaluation method for a top section of a modified Ordovician limestone confined aquifer, and the method comprises the steps: analyzing, studying and judging the hydrogeological conditions of a mine, analyzing the water disaster factors of a treatment range or region, and calculating a water inrush coefficient, so as to facilitate the arrangement of a scheme; a water-bearing layer of the project is thoroughly modified into a water-resisting layer, so that the laneway project located at the layer is in a water-free state; a full-coverage three-dimensional arrangement mode that multiple layers of horizontal holes and top-lifting layer-penetrating holes are combined is adopted, an upper layer and a lower layer are staggered and distributed in a plum blossom shape, drilled holes are formed in multiple layers in a three-dimensional mode, and multiple layers of bedding horizontal holes and layer-penetrating inclined holes are formed in a combined mode. The technical method and route for modifying the top layer of the high-pressure-bearing Ordovician aquifer into the water-resisting layer through full-space complete grouting are achieved, the production technical problem is solved, and the domestic technical blank is filled up.

The invention provides a coal seam floor water inrush risk assessment method, device and equipment and a storage medium, and relates to the technical field of coal mine safety monitoring. The method comprises the following steps: acquiring a micro-seismic data set of a micro-seismic event of a coal face to be evaluated; analyzing the micro-seismic data set, and determining the distribution characteristics of each micro-seismic event in the floor; carrying out clustering analysis on the distribution characteristics of the micro-seismic events in the bottom plate to obtain a plurality of disturbance depth intervals, and counting the frequency of the micro-seismic events in each disturbance depth interval; dividing the plurality of disturbance depth intervals into a mining failure zone and a stress disturbance zone based on the frequency of the micro-seismic event in each disturbance depth interval, a division basis of four zones under the coal seam and Ordovician limestone hole construction parameters of the to-be-evaluated coal face; and determining the water inrush risk of the coal seam floor based on the thickness of the floor water-resisting layer, the thickness of the mining failure zone, the thickness of the stress disturbance zone, the thickness of the original height guide zone and the Ordovician limestone water pressure. According to the invention, real-time evaluation can be carried out quickly and simply.

The application relates to a precision prevention and control device for directional drilling governance Ordovician limestone water, and relates to the technical field of coal mine water prevention and control. The device comprises a directional drilling mechanism for multi-angle drilling, a trajectory monitoring mechanism for real-time monitoring and correction of drilling trajectory, and a probe-drilling-irrigation-monitoring-collaboration mechanism for realizing drilling group grouting process and linkage grouting. The trajectory monitoring mechanism and the probe-drilling-irrigation-monitoring-collaboration mechanism are arranged in the directional drilling mechanism. The directional drilling mechanism can realize multi-angle drilling, reduce the governance blind area, expand the governance range, improve the governance effect and does not affect the mining connection. The trajectory monitoring mechanism can realize real-time monitoring and correction of the drilling trajectory, and ensure the accuracy of the drilling direction. The probe-drilling-irrigation-monitoring-collaboration mechanism can realize drilling group grouting process and linkage grouting, and accurately governs Ordovician limestone water.

The embodiment of the invention provides a method and a device for predicting water inrush of an Ordovician aquifer in coal mining. The method comprises the following steps: acquiring geological and hydrological data of an Ordovician aquifer, preprocessing the geological and hydrological data, and dividing the geological and hydrological data into a training set and a test set; constructing an XGBoost model, and defining hyper-parameters, a search space of the hyper-parameters and a physical constraint loss function; performing hyper-parameter tuning on the hyper-parameter search space to obtain an optimal hyper-parameter combination; the XGBoost model is trained through a training set, and a trained XGBoost model is obtained; and inputting to-be-predicted data into the trained XGBoost model, and outputting a prediction result. In this way, the prediction process can be clearly presented, the probability of water inrush of each monitoring point can be output and graded, and therefore the interpretability and practicability of the prediction result are improved.

The invention relates to a directional drilling track profile map drawing method and device, electronic equipment and a storage medium, in particular to the field of geophysical exploration technology and coal mine water control, and the method comprises the steps that firstly, drilling monitoring data of an actual drilling track in an Ordovician aquifer are obtained based on a drilling orientation instrument, and a drilling orientation instrument is established based on the drilling monitoring data; directional well design analysis software is utilized to obtain drilling control parameters corresponding to any measuring point in the actual drilling track; determining a section line corresponding to the actual drilling track according to the drilling design starting point and the drilling design end point corresponding to the actual drilling track; determining the projection length of any measuring point on the section line in the actual drilling track by using a vector projection method; and finally, drawing a profile map corresponding to the actual drilling track based on the projection length of any measuring point on the profile line and the vertical depth of any measuring point. Profile projection analysis of the actual drilling track of directional drilling can be achieved, the drawing efficiency is effectively improved, and it is guaranteed that the actual drilling position is at the designed target layer.

The invention discloses a time-controlled sidetrack drilling method for an Ordovician limestone stratum, and belongs to the technical field of coal mine water disaster area treatment. The method comprises the following steps: confirming a sidetrack drilling point in a drill hole; plugging cement at the sidetrack drilling point; the drill hole is swept to a sidetrack drilling point through a drilling tool; the drilled hole is subjected to redressing; and performing time-controlled sidetrack drilling at the sidetrack drilling point. The process is simplified, the steps are clear, and the construction difficulty is reduced; the sidetrack drilling time is short, the success rate is high, and economic benefits are improved; the method is suitable for all Ordovician limestone stratum horizontal branch wells, and the utilization range is wide.

The invention provides a mine Ordovician limestone water pressure and top interface crack detection method based on a micro-seismic technology. The method comprises the following steps: collecting actual micro-seismic data; de-noising processing is carried out on the collected actual micro-seismic data by using a wavelet threshold de-noising algorithm; a P-S wave combined positioning algorithm based on P wave and S wave first arrival is adopted to position the denoised micro-seismic event; seismic source parameter calculation and seismic source mechanism inversion are carried out based on the positioned micro-seismic event waveform and the initial polarity; ground stress inversion work is carried out, and the change condition of Ordovician limestone water pressure is deduced; calculating advanced attributes representing stratum stress or fracture characteristics on the basis of micro-seismic event source parameters, determining an advanced attribute threshold range causing Ordovician limestone water damage, and judging possible crack conditions; the Ordovician limestone top crack condition and Ordovician limestone water pressure are comprehensively analyzed, and whether the risk that Ordovician limestone water protrudes along the crack exists or not is judged. The method can monitor the water pressure change of the Ordovician limestone in real time, accurately detect the water flowing fracture of the Ordovician limestone top interface, and provide a scientific basis for mine water disaster prevention and control.

The present application relates to a method for quickly determining the water inrush channel of the Ordovician limestone in an area with unknown small coal mine mining conditions, comprising: delimiting a water inrush area in a target area on a large scale; delimiting the approximate water inrush channel range of the Ordovician limestone aquifer; determining the position of the Ordovician limestone water inrush channel; determining the development range and size of the water inrush channel; and constructing a vertical hole, followed by plugging. Advantages: avoids the disadvantages of the previous single vertical hole exploration, revealing and treating water inrush channel method, such as low probability, poor effect, long cycle; can quickly find the water inrush point, improve the speed of quick and accurate plugging of the water inrush channel, realize the quick plugging and treatment of the water inrush disaster, make the mine resume production in advance, maximize the production and economic loss caused by water disaster within the minimum damage range; can prevent the high-pressure water in the coal seam floor from continuously supplementing the upper strata vertically through the water channel, thereby reducing the mine water discharge amount, reducing the mine drainage pressure, and ensuring the safety production and economic benefits of the mine.

The invention discloses a middle indicator layer method Ordovician limestone water disaster early warning method and application, and relates to the technical field of coal seam mining. The method solves the problems that the formation and disaster-causing mechanism of the current collapse column is not completely clear, and the floor water damage caused by the collapse column cannot be accurately predicted and prevented, gets rid of the high dependence on the formation and disaster-causing mechanism, and has the advantages of high accuracy, strong practicability and relatively small investment. The method is applied in three aspects of early warning of the tunneling roadway, water disaster risk evaluation of the stope face and water disaster risk evaluation of the regional floor, and accurate early warning of the Ordovician limestone water disaster of the tunneling roadway, safe mining of the working face of the complex region and safety evaluation of the three-level partial region are achieved. And the method is suitable for North China coal field mines and has popularization value.

The present invention belongs to the field of hydrogeology, and specifically relates to a method for controlling Ordovician limestone water based on hydrogeological detection. The present invention corrects the calculation results of the bottom plate fracture zone depth based on hydrogeological detection, and comprehensively considers the lithology and layered characteristics of the rock strata, so that the corrected bottom plate fracture zone depth calculation results are more accurate, and the practical engineering application significance is stronger. It solves the problem of the existing technology of arbitrarily adding a certain thickness as a safety thickness without basis after calculation through a formula, and thus the present invention can more accurately determine the thickness of the aquifer. The present invention adopts a comprehensive control plan for the control of the confined aquifer - Ordovician limestone water, which integrates detection and pre-reinforcement, advance pressure relief, water interception and drainage, and each step of the control plan is constructed based on the actual hydrogeological detection situation, which improves the control effect of Ordovician limestone water and ensures safe production on the working face.

The invention relates to the technical field of seismic interpretation processing, and particularly discloses a strong reflection layer separation method and device based on amplitude trend correction, and the method comprises the steps: carrying out the matching pursuit strong reflection recognition of an original seismic data volume, and obtaining a matching wavelet; correcting the separation coefficient by matching the amplitude and amplitude trend characteristics of the wavelets; based on the corrected separation coefficient, carrying out strong reflection layer separation to obtain a strong reflection separation data volume; and based on the strong reflection separation data body, carrying out corresponding reservoir feature analysis and research. According to the method, the separation coefficient is corrected and strong reflection separation is carried out by utilizing the matched wavelet amplitude and the amplitude trend, the weak reflection signal is enhanced, the reservoir identification precision is improved, the strong reflection separation precision is improved, so that the weak reflection characteristic is more prominent, the T74 strong reflection event can be well separated in the Ordovician carbonate reservoir prediction in the Tarim Basin, and the prediction accuracy is improved. The reflection characteristics of the underlying small-scale fracture-cavity body are better reserved and highlighted, and the effect is obviously superior to that of a conventional method.

The invention discloses a filling material based on Ordovician limestone water and CO2 synergistically modified red mud and an application method. The method comprises the steps that coal seam strip mining is designed and implemented to construct an underground water storage reservoir; constructing a drainage drill hole group, safely draining Ordovician limestone water to a reservoir, and creating a safety condition for underlying bauxite mining; the bauxite is mined, and red mud and CO2 generated in Bayer process production of the bauxite are collected; ordovician limestone water in a reservoir is used as a medium and a calcium and magnesium ion source to cooperate with red mud, fly ash and CO2, and the high-performance filling material is prepared through a pressurized carbonation reaction; filling and supporting bauxite and a coal seam goaf by using the material; and finally recharging the residual Ordovician limestone water. According to the method disclosed by the invention, collaborative recycling of four wastes, namely the Ordovician limestone water, the red mud, the fly ash and CO2 is realized, an integrated green mining technical system of'water draining and pressure reducing-stored water utilization-solid waste gelatinization-goaf filling-residual water recharging 'is formed, and the method has comprehensive benefits of safety, environmental protection and economy.

The invention discloses a coal mine stope face Ordovician aquifer open hole water inrush rapid plugging method which comprises the steps that a drill hole is trimmed to a complete rock stratum, and a stable channel is constructed for a drill hole running sleeve; adaptive casing pipes are selected according to working conditions to be tripped into a complete rock stratum in a segmented mode; a hole opening device and a double-way conveying channel are installed at the top end of the casing pipe, and cement paste is continuously injected into the drill hole casing pipe through a hole opening system; on the basis of the water inrush working condition, the operation mode of the two-way conveying channel is switched through a valve, aggregate is synchronously filled on the premise that the grouting process is kept uninterrupted, and operation is cycled till no obvious water inrush exists on the periphery of a drill hole; and standing and curing until a water stop structure tightly combined with the sleeve and the surrounding rock is formed. According to the method, the problems of pipe diameter contradiction and hole wall breaking are solved through the simplified process of drilling hole trimming, casing pipe running-in, hole opening system construction, cement paste grouting and aggregate filling and curing solidification, and the plugging body is high in pressure-bearing resistance and suitable for water inrush of open holes and damaged casing pipe drilling holes.

The application relates to the field of mine water disaster prevention, and provides a method for identifying the fault position of Ordovician limestone karst stratum, wherein the method comprises the following steps: arranging a plurality of secondary fault exploration branch holes on the main horizontal branch hole track at intervals; arranging an upper exploration branch hole on the upper part of the secondary fault exploration branch hole; obtaining the carbonate content in the backflow cuttings, the while-drilling gamma and the drilling time data in the drilling process of the secondary fault exploration branch hole and the upper exploration branch hole to identify the fault position information. The method can solve the defects of indirectness and inaccuracy in the fault exploration in the prior art, the method can realize multi-element comprehensive identification of the fault position through horizontal and vertical directional drilling control, and the identification accuracy of the fault position is effectively improved through the carbonate content detection of the backflow cuttings, the while-drilling gamma and the drilling time comprehensive identification of the lithology.

The invention belongs to the technical field of petroleum geological exploration, and discloses an igneous rock high-precision speed modeling method and related equipment, and the method comprises the steps: building a lithofacies-seismic facies chart; constructing a seismic facies prediction model based on the lithofacies-seismic facies chart, and generating an igneous rock lithofacies prediction body through the seismic facies prediction model; establishing an igneous rock low-frequency model by taking the igneous rock facies predictor as a constraint; carrying out post-stack sparse pulse inversion through the igneous rock low-frequency model to obtain a longitudinal wave impedance attribute body, and converting the longitudinal wave impedance attribute body into a longitudinal wave velocity body, namely an igneous rock velocity body; and fusing the igneous rock velocity body with the velocity of the non-igneous rock development area to obtain an igneous rock high-precision velocity model. According to the method, the Ordovician fracture and fracture-cavity reservoir identification capability is obviously improved, and effective data support can be provided for well location argumentation and development schemes.

The invention relates to a fracture detection method based on a shear wave velocity change rate, a storage medium and equipment, and the detection method comprises the steps: carrying out three-parameter AVO inversion through a Zoeppritz Akilinear equation according to pre-stack CRP gather data and a seismic velocity, and obtaining the shear wave velocity change rate [delta] Vs / Vs data of a to-be-detected region; extracting the maximum amplitude diagram and the RMS amplitude diagram of the transverse wave velocity change rate delta Vs / Vs data of the Ordovician stratum, and / or the plane diagram of the minimum value of the transverse wave velocity relative value rVs; and delineating a high-amplitude abnormal region on the maximum amplitude diagram and the RMS amplitude diagram of the transverse wave speed change rate delta Vs / Vs, and / or delineating a low-value abnormal region on the plane diagram of the minimum relative value rVs, and the delineating abnormal region is a fracture development region or a fracture-cavity development region. According to the method, the shear wave velocity reflectivity is obtained through AVO three-parameter inversion, and direct and effective crack detection is achieved by searching for abnormity of a high-amplitude region of delta Vs / Vs or a low-value region of channel integral data of delta Vs / Vs.