66 results about "Dolostone" patented technology

The invention provides a mineralization composition as well as a preparation method and application thereof. The mineralization composition comprises modified celestite, modified strontium-containing dolomite, modified medical stone, modified zeolite, modified tourmaline, modified wollastonite and modified serpentine. The strontium ion dissolution amount of the modified celestite is 50 to 55 mg / L; the strontium ion dissolution amount of the modified strontium-containing dolomite is 15 to 20 mg / L; the metasilicate ion dissolution amount of the modified medical stone is 30 to 35 mg / L; the metasilicate ion dissolution amount of the modified zeolite is 40 to 45 mg / L; the metasilicate ion dissolution amount of the modified tourmaline is 3 to 5 mg / L; the dissolution amount of metasilicate ions in the modified wollastonite is 3 to 5 mg / L; the dissolution amount of metasilicate ions in the modified serpentine is 10 to 15 mg / L. The mineralization composition can stably and enduringly release strontium ions and metasilicate ions, and also can adjust the water quality to alkalescence, so that the water quality reaches the national drinking water standard, and safe and healthy drinking water can be provided for users.

The invention belongs to the technical field of sandy ground grouting regulation and control, and relates to a dolomite sandy ground tunnel high-pressure curtain grouting regulation and control method and system. According to the method, the fuzziness and the uncertainty of single sensing information when complex geological conditions are judged and recognized are overcome by generating the sanding rate grade map and the splitting early warning signal, and the accuracy of stratum state sensing is improved; a dynamic linkage mechanism among stratum states, risk early warning, slurry parameters and grouting parameters is established, the slurry proportion and the grouting pressure are automatically and differentially regulated and controlled according to the sanding grade, and optimal matching of the slurry property and stratum requirements and dynamic balance of safety and efficiency are achieved; the formation condition of the curtain is mastered in real time through grouting effect real-time imaging and closed-loop feedback regulation and control, the construction scheme is continuously optimized according to objective data, the uniformity, continuity and overall quality of high-pressure curtain grouting of the sandy stratum tunnel are ensured, and meanwhile material waste and construction period delay are avoided.

The invention discloses an advanced dynamic evaluation method for dolomite sanding characteristics. The advanced dynamic evaluation method comprises the following steps: determining mesoscopic and macroscopic thresholds of dolomite sanding degree grading as rock test static parameters based on an indoor test; extracting kinetic parameters and electrical parameters of the dolomite rock mass as advanced detection dynamic parameters based on geophysical advanced detection of missile-electricity combination; performing principal component analysis and correlation analysis on the rock test static parameters and advanced detection dynamic parameters, and constructing a dolomite sanding dynamic-static parameter quantitative conversion model by using RBFNN (Radial Basis Function Neural Network); training an intelligent grading evaluation model by taking the rock test static parameters as input and the sanding degree grade as output; and mapping the advanced detection dynamic parameters into rock test static parameters through the quantitative conversion model, inputting the mapped rock test static parameters into the intelligent grading evaluation model for verification and iterative optimization, and outputting a sanding degree grading result. Advanced prevention and control of sanding of the dolomite in front of the tunnel construction face can be achieved, and the ground disaster of sand collapse caused by sanding and sand gushing is avoided.

The invention provides a quantitative prediction method and a quantitative prediction system for hydrothermal dolomite, and belongs to the field of geological exploration. Comprising the following steps: performing diagenesis mechanism identification on the hydrothermal dolomite based on multidisciplinary data analysis to determine a target area in which the hydrothermal dolomite exists; performing multi-scale description on the fracture system in the target area to determine a multi-scale fracture development plane of the target interval; a one-dimensional dolomite quantitative model is established on the single well control point according to the multi-mineral model and the multiple logging curves, and a dolomite content curve of the single well control point is determined; and establishing a three-dimensional quantitative model of the hydrothermal dolomite based on the one-dimensional dolomite quantitative model of the plurality of single well control points and the multi-scale fracture development plane of the target interval so as to quantitatively predict the hydrothermal dolomite. According to the method, the development characteristics and the distribution range of the hydrothermal dolomite in the fault and fracture development area can be identified, the content of the hydrothermal dolomite can be quantitatively analyzed, and data support is provided for subsequent heterogeneous reservoir and high-permeability strip prediction.

The invention belongs to the technical field of tunnel surrounding rock assessment, and provides an intelligent assessment method and system for the surrounding rock category of a sanded dolomite tunnel, and the method comprises the steps: judging whether the characteristics of a sanded strip are remarkably and suddenly increased or not by comparing the parameters of the sanded strip of a preorder region and the parameters of the sanded strip of a subsequent region in the tunnel; if yes, verifying the suitability of the characteristic capture of the sanding strips in the preorder area and the subsequent area of the initial evaluation unit, and judging whether the quantitative classification requirements of the sanding characteristics of the preorder area and the subsequent area can be met at the same time or not; if not, screening a general evaluation unit capable of giving consideration to the characteristics of the front and back sequence regions; if the general evaluation unit does not exist, determining an exclusive evaluation unit of the subsequent region, positioning a significant sudden increase starting point of the sanding strip characteristics, performing scale mutation analysis in combination with the exclusive evaluation unit and the initial evaluation unit, and determining a switching transition zone of the initial evaluation unit and the exclusive evaluation unit; and the adaptability and continuity of evaluation of different regions are ensured.

The application discloses a method and system for predicting water inrush of sandified dolomite stratum under water-rich conditions, comprising: obtaining first detection data and second detection data; extracting first cross-section data and second cross-section data; the cross-section data is position data of a cross-section with discontinuity; comparing the first cross-section data and the second cross-section data, and taking a region with a difference greater than a preset value between the first cross-section data and the second cross-section data as a target drilling region; obtaining third cross-section data; forming cross-section fitting data of the target cross-section; and predicting construction water inrush risk. The method and system for predicting water inrush of sandified dolomite stratum under water-rich conditions effectively improve the advanced detection capability of sandified dolomite tunnel construction, improve construction safety and reduce construction risk by data fusion on the detection data in front of a tunnel face and accurate data acquisition and completion in combination with the advanced drilling technology.

The invention discloses an algorithm-based detritus dolomite sedimentary microfacies identification method, and relates to the technical field of rock sedimentary microfacies identification, and the method comprises the following steps: collecting a detritus dolomite sample, and carrying out analysis to obtain the structure and characteristics of the detritus dolomite sample; extracting features in the structure and the characteristics; selecting a machine learning algorithm; using known detritus dolomite sedimentary microfacies data as a training set, and training a machine learning algorithm to obtain a microfacies recognition model; and then the microfacies identification model is applied to actual detritus dolomite sedimentary microfacies identification, the method can obviously reduce the labor force required by detritus dolomite sedimentary microfacies identification, so that the laboratory analysis is time-saving and labor-saving, and when the microfacies identification model is used for identifying detritus dolomite, the identification result is more objective, effective, accurate and reliable; and the microscopic characteristics or microstructure of the rock stratum can also be captured.

The application provides a compact dolomite reservoir composite acid fracturing process parameter evaluation system and method, which comprises a simulated fracture device, an acid injection device and a circulating water injection device. The acid injection device comprises an acid storage container, an acid injection pipeline and an acid discharge pipeline. The acid injection pipeline is connected to the acid storage container and the acid injection liquid inlet hole of the simulated fracture device at both ends. The acid discharge pipeline is connected to the acid injection liquid outlet hole of the simulated fracture device. The circulating water injection device comprises a water storage container, a water inlet pipeline and a circulating water discharge pipeline. The water inlet pipeline is connected to the water storage container and the water injection liquid inlet hole of the simulated fracture device at both ends. The circulating water discharge pipeline is connected to the water injection liquid outlet hole of the simulated fracture device and the water storage container at both ends. The application adopts reverse thinking to evaluate the composite acid fracturing process parameters such as the preflush / acid viscosity ratio, the pump injection displacement and the alternating series by taking the fractal dimension, the acid volume, the flow conductivity and the acid fluid loss as the targets, and is more specific and systematic.

The invention relates to the field of marine carbonate rock sequence research, and discloses a marine carbonate rock reservoir high-frequency sequence division method and system.The method comprises the steps that firstly, a GR curve is exported into a text format, and a GR curve text file is obtained; the method comprises the following steps: importing an Acycle, and carrying out pretreatment; performing spectral analysis, screening a curve with a standard Milankovitch cycle ratio, and calculating the average number of each level sequence developed by the layer section; carrying out wavelet transformation on the GR curve by utilizing MATLAB (matrix laboratory), and separating out wavelet curves of different levels; carrying out trending processing on the GR curves of the multiple target layers through INPEEA method processing to obtain a contrast curve; carrying out wavelet signal curve level matching and layer sequence division, and carrying out contrast inspection; according to the method, effective signals reflecting different levels of cycle changes can be extracted, high-frequency cycles are accurately divided, the influence of subjectivity and multi-level sequence superposition interference on sequence division is effectively eliminated, and a theoretical basis and service are provided for deep dolomite reservoir distribution prediction.

The invention belongs to the technical field of geophysical exploration and oil and gas reservoir evaluation, and particularly relates to a heterogeneous dolomite reservoir fractal rock physical modeling method. The method comprises the following steps: data acquisition and processing: acquiring ultrasonic velocity and attenuation data, and acquiring acoustic logging data and post-stack seismic data of a target layer; constructing a fractal rock physical model; generating a multi-band rock physical drawing board; drawing board correction and reservoir parameter quantitative prediction. The fractal dimension serves as a clear and predictable key parameter to be introduced into the dolomite rock physical model for the first time, the limitation that a traditional model can only predict the pore volume (porosity and fracture content) but cannot describe the pore structure form is broken through, the precision and dimension of reservoir physical property prediction are improved, and the reservoir physical property prediction accuracy is improved. By combining an infinite heavy pore medium model with a fractal theory, the established model can simulate propagation of waves in an actual complex porous medium more truly, spanning from two dimensions to three dimensions is realized, and multiplicity of reservoir prediction is greatly reduced.

The present application relates to the technical field of rock lithology exploration, and more particularly to a dolomite lithology prediction method, system and device; comprising the following steps: S1, obtaining drilled well data and seismic data of a region to be identified; S2, performing standardization processing; S3, performing well control feature frequency extraction; S4, performing fine production of a synthetic record for the region to be identified; S5, determining a seismic interpretation mode scheme for the region to be identified; S6, determining dolomite attributes; S7, obtaining a first content of dolomite in the region to be identified; S8, determining a second content of dolomite in the region to be identified; S9, determining whether the dolomite attributes determined in the step S7 are qualified according to the first content of dolomite and the second content of dolomite; and quantitatively predicting the content of dolomite in a carbonate rock formation.

An aqueous modified or synthetic acid compositions comprising: an acid; and a first component comprising: an amine and a carboxylic acid group; wherein said first component and said acid are present in a molar ratio ranging from 1:3 to 1:15, more preferably from 1:3 to 1:12.5. Said acid compositions are useful in acidizing or stimulating dolomite formations. Said acid compositions are also useful in creating wormholes in hydrocarbon-containing formations.

The present application relates to the geological exploration and oil and gas exploration technical field, specifically relates to a kind of based on geology-geophysical analysis's beach facies dolomite distribution prediction method.The present application first obtains the vertical development characteristics of dolomite in target interval of single well in study area, then determines the vertical seismic reflection characteristics of dolomite, carries out forward modeling on the basis of the vertical seismic reflection characteristics of single well, obtains the lateral seismic reflection characteristics of single well, then different lithology is decomposed by waveform decomposition technology, finally, by comparing waveform component and the vertical development favorable facies zone single well geology and seismic reflection characteristics, the distribution of dolomite is determined.The identification method provided by the present application is not only simple to operate, and in the distribution of dolomite reservoir which is difficult to accurately identify under conventional seismic data, the distribution of dolomite reservoir of different types, different thicknesses and different development positions can be quickly identified, which provides reliable basis for the exploration and development of beach facies dolomite gas reservoir.

The invention relates to a carbonatite gas reservoir sweet spot identification method and device, a storage medium and electronic equipment. The method comprises the following steps: determining reservoir lithology and a pore-permeability development zone of a target carbonatite gas reservoir; according to the lithology of the reservoir, obtaining dolomite content data meeting a lithology classification strategy, and according to the logging data of the porosity and permeability development zone and analysis and test data obtained by using a total rock mineral analysis method, constructing a porosity curve and a permeability curve of the target carbonate gas reservoir; obtaining ant body attribute data and root mean square attribute data of the target carbonate gas reservoir according to the seismic data; obtaining a dolomite distribution range by utilizing a phase model according to the dolomite content data and the root mean square attribute data, and obtaining a pore distribution range by utilizing a phase simulation model according to the porosity curve, the permeability curve and the ant body attribute data; and overlapping the dolomite distribution range and the pore permeability distribution range to obtain the dessert of the target carbonate gas reservoir. The recognition efficiency can be improved.

The application provides a grouting construction method for medium-sand dolomite gushing confined water, which comprises the following steps: firstly, a drilling machine is used to drill a hole through a sectioned orifice pipe, when the single-hole water inflow is greater than or equal to 40 m 3 / h, a short pipe and a long pipe are connected with a water plugging plate core pipe, and the short pipe is connected with a grouting pipe; secondly, a double-liquid double-injection process is used to inject a double-liquid slurry into the gap between the pipe bundle and the hole through the short pipe; finally, after 6-8s of the double-liquid slurry, a single-liquid single-injection process is used to inject a single-liquid slurry through the long pipe, the injection pressure of the single-liquid slurry is continuously increased, the single-liquid slurry is infiltrated into the stratum by using the long pipe wall grouting divergent hole under the continuous action of the pressure, and an effective water interception curtain and an advanced pre-support system are formed. The method solves a series of problems, such as pressure attenuation, slurry backflow, limited range, long time consumption and limited pressure, which exist in the traditional construction. The method belongs to the field of tunnel engineering construction.

This invention discloses a method for preparing lightweight calcium carbonate from dolomite, comprising the following steps: crushing, grinding, and calcining raw dolomite to obtain lightly calcined dolomite powder; subjecting the lightly calcined dolomite powder to acid leaching to obtain an acid leaching solution; adjusting the pH of the acid leaching solution to 12.3-12.6 with alkali, then introducing carbon dioxide to bring the pH to 7.6-8.4, followed by solid-liquid separation to obtain lightweight calcium carbonate. This invention, through calcination, acid leaching, and carbonation of dolomite, produces lightweight calcium carbonate that not only meets the requirements for precipitated calcium carbonate for plastics in the standard "General Industrial Depositional Calcium Carbonate," but also meets the requirements for calcium carbonate for rubber, coatings, and papermaking, thus possessing significant application value and broad prospects.

The invention relates to talaromyces pseudomonas hzt-3'as well as a preparation method and application of the talaromyces pseudomonas hzt-3 ', and belongs to the technical field of application of microorganisms. The strain is preserved in the China Center for Type Culture Collection, the preservation number of the strain is CCTCC NO: M 20251797, and the strain is classified and named as (Talaromyces pseudomonas hzt-3 '). The method comprises the following steps: collecting moss and vegetation soil samples from basalt, diabase and dolomite; diluting bacterial colonies in the sample, and separating and purifying the bacterial strains by using a Czapek culture medium; anorthite and serpentine are used as inorganic salt sources for strain screening, and strains which grow stably and have a good leaching effect on calcium magnesium silicate minerals are obtained; the strain is applied to efficient leaching of anorthite, serpentine and wollastonite, and compared with a sterile control group, the effect of improving the leaching rate of calcium and magnesium ions is remarkable. The method solves the problem that the reaction rate of mineral sequestration carbon dioxide is slow due to the fact that ions in natural silicate minerals are difficult to leach, and has great significance.

The application belongs to the technical field of dolomite ore fine material processing, in particular to a dolomite ore fine material screening device and method, which comprises a shell, a first feeding groove is formed in the top surface of the shell, a first discharging groove is formed in the side wall of the shell, and a second discharging groove is formed in the bottom surface of the shell; an inclined fixed block is arranged in the shell, a first screening plate is fixedly connected to one side of the fixed block close to the first discharging groove, and a plurality of first screening holes are formed in the first screening plate; the output end of an electric telescopic rod is used to push a second screening plate by starting the electric telescopic rod, at this time, the positions of the first screening holes and the second screening holes are dislocated, the second screening plate blocks the first screening holes, the aperture of the first screening holes is adjusted, after the aperture of the first screening holes is adjusted to a suitable position, the electric telescopic rod is turned off, and the dolomite ore can be screened again to further screen smaller dolomite ore.

The application discloses a method and device for determining sequence boundaries of high-frequency seismic sequence strata, which comprises the following steps: generating a relative geologic time model according to a three-dimensional seismic data body, extracting an initial seismic-based medium-low-frequency first sequence boundary data body, extracting a seismic-based first-time sequence boundary curve, performing baseline removal, obtaining a seismic-based second sequence boundary data body through first-time waveform difference inversion, extracting a seismic-based third-time sequence boundary curve as a base curve, fusing the base curve with a gamma curve, a porosity curve, a carbonate rock particle curve, a carbonate rock texture curve, a carbonate rock suture line frequency curve, an asphalt content curve and a dolomite content curve which reflect sequence boundaries, and obtaining a seismic-based high-frequency third sequence boundary data body through second-time waveform difference inversion after the fusion, and finally identifying high-frequency seismic sequence boundaries with very high precision.

The present application relates to a kind of carbonate lithology identification method based on well logging parameter, device and storage medium, belong to rock type identification technical field, the method includes: the multiple carbonate thin section of target formation is calibrated, obtains the well logging parameter and type of corresponding depth of carbonate thin section;Carbonate thin section includes dolomite thin section and limestone thin section;Based on the well logging parameter of corresponding depth of carbonate thin section plot crossplot, and determine target parameter according to crossplot and type;Target parameter includes uranium value, thorium value, acoustic time difference and compensation neutron;Based on target parameter, the lithology of dolomite and limestone in non-coring section is identified.The present application provides the carbonate lithology identification method based on well logging parameter, is analyzed with multiple parameters such as uranium, thorium, acoustic time difference and compensation neutron, realizes accurate identification to carbonate lithology.

The present application belongs to the technical field of sanding ground grouting regulation, and relates to a dolomite sanding stratum tunnel high-pressure curtain grouting regulation method and system. The present application generates a sanding rate grade map and a splitting early warning signal, overcomes the ambiguity and uncertainty of single sensing information in identifying complex geological conditions, and improves the accuracy of stratum state perception. A dynamic linkage mechanism between stratum state, risk early warning, and slurry parameters and grouting parameters is established, slurry proportioning and grouting pressure are automatically and differentially regulated according to the sanding grade, the best matching of slurry properties and stratum demand and the dynamic balance of safety and efficiency are realized, the curtain formation is mastered in real time through real-time imaging and closed-loop feedback regulation of grouting effect, the construction scheme is continuously optimized according to objective data, the uniformity, continuity and overall quality of the dolomite sanding stratum tunnel high-pressure curtain grouting are ensured, and material waste and construction delay are avoided.

The invention discloses a quantitative identification method and system suitable for an ancient dolomite hydrothermal fluid source, and relates to the technical field of geological exploration, the method comprises the following steps: S1, multi-scale petrology determination of a hydrothermal fluid; s2, performing micro-area-element quantitative determination on the fluid components of the hydrothermal solution; s3, performing micro-zone-isotope quantitative determination on the fluid property of the hydrothermal solution; s4, quantitatively determining the temperature of the hydrothermal fluid; and S5, performing hydrothermal fluid event reduction based on absolute time limitation. Experiments are performed in combination with multiple scales and multiple methods, and the disadvantage that it is difficult to determine data anomalies is solved; the micro-area micro technology is emphasized, and errors caused by the fact that hydrothermal minerals in small adjacent periods are difficult to distinguish during conventional total rock quantitative analysis sampling are avoided; a dating technology is applied to obtain an accurate hydrothermal age, the accurate hydrothermal age is used as a limit, a regional geological background is traced back, a corresponding basin thermal event is reversely deduced through fluid activity time, and determination of hydrothermal fluid activity events and sources in the ancient dolomite is realized.

The present invention discloses a model test device suitable for simulating sudden water intrusion in water-rich sandy dolomite. The device comprises a test box with an opening at the top, a yellow clay layer within the test box, and a surrounding rock layer and a gravel layer embedded in the clay layer. A pressure plate is provided at the opening of the test box, and a water tank is mounted on the pressure plate. A movable plate is provided in the water tank, and an inlet pipe extending into the gravel layer is provided on the water tank. The device also comprises a pressure assembly, which includes a first output shaft and a second output shaft. The first output shaft is configured to be inserted into the water tank and push the movable plate to move, and the second output shaft is configured to push the water tank to squeeze the pressure plate. By simulating the differences in the evolution of multiple fields such as surrounding rock stress and water inrush during water inrush, the mechanism of water and sand inrush and the early warning information when a disaster occurs are analyzed.

The present invention discloses a method and system for grading the degree of sandification of dolomite during tunnel construction, comprising: obtaining the apparent resistivity and first resistivity of a target section; testing the resistivity of a core sample as a second resistivity, and testing the resistivity of a solid-liquid mixture as a third resistivity; calculating first fracture data and second fracture data; the second fracture data being the distribution of non-through fractures in the core sample; and grading the degree of sandification of the dolomite according to the first fracture data and the second fracture data. The present invention provides a method and system for grading the degree of sandification of dolomite during tunnel construction. Through the above-mentioned technical means, the method and system provide quantitative and intuitive data for on-site judgment of the degree of sandification of dolomite, reducing the judgment error caused by subjective judgment of on-site construction personnel, providing a solid and reliable basis for the formulation of subsequent construction plans, effectively improving construction safety, and providing a reference for the subsequent information-based construction of other sandy dolomite tunnels.

The present invention discloses an anti-vortex PDC drill bit for dolomite formations, which belongs to the technical field of oil exploration drilling bits. It includes a main body and a plurality of auxiliary blades and main blades connected to the main body, and a plurality of nozzles are provided between the auxiliary blades and the main blades. It is characterized in that the outer side of the shoulder and the gauge portion of the auxiliary blades and the main blades are provided with a plurality of conical teeth, and the other cutting parts of the auxiliary blades and the main blades are provided with a plurality of multi-edge teeth; in the direction of travel of the drill bit, the tooth arrangement height of the conical teeth is higher than that of the adjacent multi-edge teeth. Based on the lithologic characteristics and rock mechanics parameters of the dolomite formation, the present invention adopts a mixed tooth arrangement method of conical teeth and multi-edge teeth. The sum of the force vectors of the cutting teeth is close to zero, and the drill bit runs in a stable state, thereby improving the drill bit's anti-vortex ability and stability.

The invention provides a mineralized filter element based on a natural rock material as well as a preparation method and application of the mineralized filter element. The mineralized filter element is prepared from a main material and an auxiliary material, wherein the main material adopts a modified natural rock material, and specifically comprises modified celestite, modified medical stone, modified spodumene, modified zeolite, modified dolomite, modified sphalerite, modified magnesite and modified quartz porphyry; the auxiliary materials comprise activated carbon and a binder. The preparation method sequentially comprises the steps of modifying, burdening, canning, compacting, baking and demolding. Wherein the modification comprises the following steps: sequentially carrying out acid pickling, water washing, calcining, cooling, crushing and screening on the natural rock material, so as to obtain the modified natural rock material. Natural rock materials are extracted from the nature to be modified and added into the mineralization filter element, various mineral elements needed by the human body can be released, remineralization of low-mineralization-degree water is achieved, and large-scale application and popularization are facilitated.

The present invention relates to the field of geological exploration, and provides a quantitative prediction method and a quantitative prediction system for dolomite. The method comprises: performing diagenetic mechanism identification on dolomite on the basis of multidisciplinary data analysis to determine a target region where the dolomite is present; performing multiscale characterization on a fault system in the target region to determine a multiscale fracture development plane of a target interval; establishing a one-dimensional dolomite quantitative model on a single-well control point on the basis of a multimineral model and a plurality of well logging curves, and determining a dolomite content curve of the single-well control point; and establishing a three-dimensional quantitative model of the dolomite on the basis of the one-dimensional dolomite quantitative model of a plurality of single-well control points and the multiscale fracture development plane of the target interval to perform quantitative prediction on the dolomite. In the present invention, the development characteristics and a distribution range of dolomite in a fault and a fracture development zone can be identified, and the content of the dolomite can be quantitatively analyzed, providing data support for subsequent prediction of heterogeneous reservoirs and high-permeability strips.

The application discloses a kind of geologic history period microbial dolomite deposition mechanism quantitative simulation calculation method, which comprises the following steps: accurately assess whether the signal of original depositional environment of sample is preserved during deposition period, calculate the concentration of pH value, total alkalinity, calcium ion and magnesium ion of paleoseawater during deposition period, reconstruct the attribute parameter of paleoseawater in geologic history period, quantitatively analyze the different influence of the difference of physical and chemical conditions of paleoseawater on the deposition process of microbial dolomite, simulate and calculate the microbial dolomite genesis mechanism and process in geologic history period.The application quantitatively and comprehensively studies the microbial dolomite genesis mechanism, and can provide new ideas for the genesis of similar dolomite in geologic history period and the comprehensive solution of the old mystery "dolomite problem".

The invention provides a preparation method and application of modified dolomite, and belongs to the technical field of inorganic filler. The method comprises the following steps: mixing dolomite powder and a solvent to prepare slurry; a modifier is added into the slurry and stirred for a reaction, a mixed material is obtained, and the modifier comprises oleic acid and an aluminate coupling agent; and carrying out solid-liquid separation on the mixed material, collecting a solid phase, and drying the solid phase to obtain the modified dolomite. On the premise of high activity and high hydrophobicity of aluminate, oleic acid is introduced to make up for the defect that a single aluminate coupling agent may cause a high oil absorption value, so that the modified dolomite has high activation index, high hydrophobicity and low oil absorption value, thereby well improving the surface hydrophilicity and hydrophobicity and interface bonding force of the dolomite; the modified dolomite is more suitable for being combined with other components for application, the additional value of dolomite mineral resources is effectively improved, and a feasible path is provided for high-quality development of dolomite.

The application belongs to the technical field of roof reinforcement and support in underground mining, and discloses a bauxite soft roof advanced grouting solidification method. The method first acquires direct roof and indirect old roof information, determines the soft direct roof to be solidified, and takes the lithological interface between the soft direct roof and the indirect old roof of dolomite as the bottom control interface of the grouting hole. Then, the advanced grouting hole is arranged according to the working conditions such as mining and cutting roadway excavation, room and pillar mining or room and pillar subsequent filling, and the grouting solidification is carried out by using silicate modified polyurethane two-component material. Finally, the solidification quality is verified by coring, acoustic wave and on-site monitoring, and the roof protection mining and excavation operation is cancelled after the index is met, so that the roof stability and resource recovery rate are improved.